CBSE > Class 10 > Mathematics | CBSE Board | Homework Help

Construction : Draw {tex}A L \perp B C{/tex}
or, AL is median of BC (Isosceles triangle)
or, BL = LC = 6 cm.
In right {tex}\triangle A L B,{/tex} by Pythagoras theorem, AL = 8 cm.
In {tex}\triangle B P Q \text { and } \triangle B L A{/tex}
{tex}\angle B = \angle C{/tex} (Isosceles triangle)
{tex}\angle B P Q = \angle B L A = 90 ^ { \circ }{/tex}
{tex}\triangle B P Q \sim \triangle B L A{/tex} (AA similarity)
or, {tex}\frac { B P } { P Q } = \frac { B L } { A L }{/tex}
or, {tex}\frac { 6 - x } { y } = \frac { 6 } { 8 } \text { or, } x = 6 - \frac { 3 y } { 4 }{/tex}
Hence proved.

0Thank You

ANSWER

(1)Explain three factors that determine the outcome of politics of social divisions.

Posted by Jitender Shaw 7 years, 9 months ago

CBSE > Class 10 > Mathematics

3 answers

Jitender Shaw 7 years, 9 months ago

Please describe it

0Thank You

Vashu Yadav 7 years, 9 months ago

People ,leader,foolower

0Thank You

Lavisha Nawal 7 years, 9 months ago

1 people perception about there identities 2 role of political leaders 3 attitude of the government

0Thank You

ANSWER

(1) Name two waste products which are stored in old xylem in plants. (2) Name the process by which plants get rid of excess water. Name the pores through which this process takes place.

Posted by Jitender Shaw 7 years, 9 months ago

CBSE > Class 10 > Mathematics

4 answers

Jitender Shaw 7 years, 9 months ago

One is gums.Aapne gums nahi bola. Aapne only resins hi bola.

0Thank You

Cutiee Princess 7 years, 9 months ago

I think so the process is osmosis n stomata is the pores through which this process takes place.

0Thank You

Vashu Yadav 7 years, 9 months ago

Resin , transpiration pull , stomata

0Thank You

Samaayra Bharti 7 years, 9 months ago

(2)transpiration and pores are stomata

0Thank You

ANSWER

What is meant by scattering of light ? Use this phenomenon to explain why the clear sky appears blue or the sun appears reddish at sunrise.

Posted by Jitender Shaw 7 years, 9 months ago

CBSE > Class 10 > Mathematics

2 answers

Cutiee Princess 7 years, 9 months ago

Scattering of light means to throw light in various random direction.......the extremely minute particles such as the air molecules present in the atmosphere scatter mainly the blue light present in the white light .. The scattering of blue component of the white sunlight by air molecules present in the atmosphere causes blue colour of the sky ..

0Thank You

Lavisha Nawal 7 years, 9 months ago

The phenomenon in which a part of the light incident On a particle is redirected in different directions is called the scattering of light .at the time of sunrise and sunset when the sun is near the horizon sunlight travels a greater distance through the atmosphere to reach us. During the most of the shorter wavelenghts present in it are scattered away from our line of sight by the molecules of air and other fine particles in the atmospher so light reaching us directly from the rising or setting Sun consists mainly of the longer wavelenght red colour bcoz of which object in the dim light.

0Thank You

ANSWER

2×999999

Posted by Jas Kirat 7 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Cutiee Princess 7 years, 9 months ago

1999998

0Thank You

ANSWER

Sample papers free me nhi ayega

Posted by Santosh Rohidas 7 years, 9 months ago

CBSE > Class 10 > Mathematics

3 answers

Cutiee Princess 7 years, 9 months ago

It is available in net

2Thank You

Rex Cartin 7 years, 9 months ago

Do u want sample paper

1Thank You

Rex Cartin 7 years, 9 months ago

Matlab

0Thank You

ANSWER

Common tangents AB and CD to two circles intersect at E. Prove that AB=CD.

Posted by Keshav Gupta 7 years, 9 months ago

CBSE > Class 10 > Mathematics

3 answers

Cutiee Princess 7 years, 9 months ago

Join OE Then prove both triangle congruent So by cpct AB = CD

0Thank You

Vashu Yadav 7 years, 9 months ago

Meet OE Congrant both the triangle Ab = CD by cpct

0Thank You

Amneet Kaur 7 years, 9 months ago

Impossible to explain here sorry

1Thank You

ANSWER

How many silver coins 1.75cm in diameter and of thickness 2mm must be melted to form a cuboid of dimensions 5.5cm×10cm×3.5cm?

Posted by Khushboo Pandit 6 years, 5 months ago

CBSE > Class 10 > Mathematics

1 answers

Sia ? 6 years, 5 months ago

For a silver coin Diameter = 1.75 cm
{tex}\therefore {/tex} Radius (r)={tex}\frac{{1.75}}{2}cm = \frac{7}{8}cm{/tex}
Thickness (h) = 2 mm ={tex}\frac{1}{5}cm{/tex}

{tex}\therefore {/tex} The volume of a silver coin
={tex}\pi {r^2}h = \pi {\left( {\frac{7}{8}} \right)^2}\left( {\frac{1}{5}} \right){/tex}
={tex}\frac{{49}}{{320}}\pi c{m^3}{/tex}
Let n coins be melted.
Then, volume of n coin={tex}n\frac{{49}}{{320}}\pi c{m^3}{/tex}
For cuboid
length(L) = 5.5 cm
breath(B) = 10 cm
height(H) = 3.5 cm
{tex}\therefore {/tex} The volume of the cuboid = lbh
=5.5 × 10 × 3.5=192.5
={tex}\frac{{1925}}{{10}} = \frac{{385}}{2}{/tex}cm²
According to the question,
{tex}n\frac{{49\pi }}{{320}} = \frac{{385}}{2} \Rightarrow n = \frac{{385}}{2}.\frac{{320}}{{49\pi }}{/tex}
{tex}\Rightarrow {/tex} {tex}n = \frac{{385}}{2}.\frac{{320}}{{49}}.\frac{7}{{22}} \Rightarrow n = 400{/tex}
Hence, 400 coins must be melted

0Thank You

ANSWER

find the sum of first 30 multiples of 11

Posted by Ashok Jat 7 years, 9 months ago

CBSE > Class 10 > Mathematics

4 answers

Vashu Yadav 7 years, 9 months ago

11, 22,33 -------- S30 =15{2(11)+29(11)} =15(22+319) =15(341) =5115

0Thank You

Ashok Jat 7 years, 9 months ago

jaldi bata do koi

1Thank You

Ashok Jat 7 years, 9 months ago

fully solved chahiye

2Thank You

Shanaya Dabas 7 years, 9 months ago

5115

3Thank You

ANSWER

Prove that the angle made by the intercept of the circle at its centre is 90 . (100% coming quest.)

Posted by Shubham Yadav 7 years, 9 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

A card of ace

Posted by Satender Kumar 7 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Himanshu Jha 7 years, 9 months ago

0Thank You

ANSWER

Find sum of following series 5+(-41)+9+(-39)+13+(-37)+17+........+(-5)+81+(-3)

Posted by Cbse Guide 7 years, 9 months ago

CBSE > Class 10 > Mathematics

2 answers

Harsh Sidhapurker 7 years, 9 months ago

The series becomes -36,-30,-24 after adding the respective numbers so here a=-36 d=6 we don't know n and an= 78 so by substituting the values of of a ,d,and an in an formula u get n and by substituting n,an and ,a in an formula u get the answer...hope it helped

1Thank You

Cbse Guide 7 years, 9 months ago

Kisi ko aata hai ??

0Thank You

ANSWER

The motarboat whose speed is 24 km/hr in a still water takes 1 hr more to go 32 km upstream than to return downstream to the same spot find the speed of stream.

Posted by Tanu Priya 7 years, 9 months ago

CBSE > Class 10 > Mathematics

6 answers

Ritu Thapliyal 7 years, 9 months ago

0Thank You

Tanu Priya 7 years, 9 months ago

Thanks ritu

0Thank You

Ritu Thapliyal 7 years, 9 months ago

Example is given in NCERT pg no- 87

0Thank You

Tanu Priya 7 years, 9 months ago

Plzz explain me more shaily

0Thank You

Vaishnav Tiwari 7 years, 9 months ago

speed of boat in upstream 24-x And in downstream 24+x Time=dis/, speed rkhi Time taken in downstream-time taken in upstream=1

0Thank You

Ritu Thapliyal 7 years, 9 months ago

Speed of stream is 8km/hr

0Thank You

ANSWER

A coil of insulated Cooper wire is connected to a galvanomater. What will happen if a bar magnet is 1.pushed into the coil it's north pole entering first

Posted by Rohan Kumar 7 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Amrit Amrit 7 years, 9 months ago

Galvanometer goes to direction in which current is following in circit..

1Thank You

ANSWER

ABC is an iscosceles triangle right angle at B. Two equilateral triangles ACD and ABE are constructed on the side AC and AB respectively. Find the ratio of areas of triangle ABE and triangle ACD

Posted by Samaayra Bharti 6 years, 5 months ago

CBSE > Class 10 > Mathematics

1 answers

Sia ? 6 years, 5 months ago

ABC is an isosceles triangle right angled at B,
Let AB=BC=x cm

By Pythagoras theorem In {tex}\triangle {/tex} ABC
AC²= AB²+ BC²
AC²= x² + x²
AC²= 2x²
AC={tex}\sqrt 2 {/tex} x
{tex}\triangle{/tex}ACD{tex}\sim{/tex}{tex}\triangle{/tex}ABE (Given)

Thus, using Area Theorem
{tex}\therefore{/tex}{tex}\frac { \operatorname { ar } \Delta \mathrm { ABE } } { \operatorname { ar } \Delta A \mathrm { CD } } = \frac { \mathrm { AB } ^ { 2 } } { \mathrm { AC } ^ { 2 } } = \frac { x ^ { 2 } } { ( \sqrt { 2 } x ) ^ { 2 } }{/tex}
={tex}\frac { x ^ { 2 } } { 2 x ^ { 2 } }{/tex}={tex}\frac{1}{2}{/tex}=1:2.
Hence, Areas of the two given triangles are in the ratio 1:2

0Thank You

ANSWER

Solve 1+4+7+10+..................x = 590

Posted by ∂Αяѕнαиαα ყα∂Αѵ ??? 7 years, 9 months ago

CBSE > Class 10 > Mathematics

8 answers

Online Only On Brnly Geniusvatsone 7 years, 9 months ago

Hota hai....mistake sab se hota hai..??

0Thank You

Online Only On Brnly Geniusvatsone 7 years, 9 months ago

Are yar sorry calculation jldi jldi me garbar..ho gya tha...it's 58

1Thank You

Gitika Singh 7 years, 9 months ago

0Thank You

∂Αяѕнαиαα ყα∂Αѵ ??? 7 years, 9 months ago

The correct answer is :58

0Thank You

Online Only On Brnly Geniusvatsone 7 years, 9 months ago

Genius se jyada ......???

1Thank You

∂Αяѕнαиαα ყα∂Αѵ ??? 7 years, 9 months ago

0Thank You

Online Only On Brnly Geniusvatsone 7 years, 9 months ago

X=40

1Thank You

Amrit Amrit 7 years, 9 months ago

0Thank You

ANSWER

the ratio of sum of m&n terms of an AP are m2:n2.find the ratio of their m&n term

Posted by ∂Αяѕнαиαα ყα∂Αѵ ??? 7 years, 9 months ago

CBSE > Class 10 > Mathematics

3 answers

∂Αяѕнαиαα ყα∂Αѵ ??? 7 years, 9 months ago

Ya right

0Thank You

∂Αяѕнαиαα ყα∂Αѵ ??? 7 years, 9 months ago

Hyy one girl is searching you.

0Thank You

Online Only On Brnly Geniusvatsone 7 years, 9 months ago

M= 2m - 1 and n= 2n - 1 ....que bhut achha hai..time lga diya?

1Thank You

ANSWER

What will be number of real zeroes of polynomial x square +1?

Posted by Goldy Singh 7 years, 9 months ago

CBSE > Class 10 > Mathematics

3 answers

Mayank Sahu 7 years, 9 months ago

0Thank You

Rikku Mahto 7 years, 9 months ago

X=-1

0Thank You

Online Only On Brnly Geniusvatsone 7 years, 9 months ago

1Thank You

ANSWER

While boarding an aeroplane a passenger got hurt The Pilot showing promptness and concern made arrangements to Tu hospitalize the injured and so the Planes started late by 30 minutes to reach the destination 1500 km away in the time the in a time the pilot increase the speed by hundred km Parag find the original speed per hour of plane do you appreciate the value shown by the pilot namely promptness in providing help to injured and his effort to reach in time

Posted by Sheetal Sharma 7 years, 9 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

If D is HCF of 40 and 65 find the value of integers x and y which satisfy d= 40x+65y.

Posted by Abdul Hasan 7 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

ब्राहम्ण Boy 7 years, 9 months ago

Very easy one use Euclid division algorithm and point every steps as an equation and then solve it

0Thank You

ANSWER

Find the value of p if the mean value is 50

Posted by Jay Gupta 7 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

ब्राहम्ण Boy 7 years, 9 months ago

Data or information is not sufficient

1Thank You

ANSWER

Explain why 7×6×5×4×3×2×1+5 and 7×11×13+13 are composite numbers

Posted by Latha Anil 7 years, 9 months ago

CBSE > Class 10 > Mathematics

5 answers

Latha Anil 7 years, 9 months ago

7×11×13+13=13(7×11+1) It has a factor 13 other than 1 and n( n=any integer) 7×6×5×4×3×2×1+5=5(7×6×4×3×2×1+1) It has a factor 5 other than 1 and n(n=any integer) The numbers with 3 or more factors are composite numbers.Therefore,these 2 numbers are composite numbers

1Thank You

Amrit Amrit 7 years, 9 months ago

So the are composite no.

0Thank You

Amrit Amrit 7 years, 9 months ago

Both have more than two factor...

1Thank You

ब्राहम्ण Boy 7 years, 9 months ago

It is very easy just know as about composite number and do an example related to this and you can easily solve this question

0Thank You

Avni Kankaria 7 years, 9 months ago

Take 5(7×6×1×4×3×2×1)+1 Take 13 (7×11×1)+1