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

The area of the shaded region
$= A ( \Delta A B C ) - A ( \Delta A D C )$
$= \frac { 1 } { 2 } \times \text { height of } \Delta A B C \times A C + \frac { 1 } { 2 } \times \text { height of } \Delta A D C \times A C$
$= \frac { 1 } { 2 } \times 4 \times 6 + \frac { 1 } { 2 } \times 3 \times 6$
= 21 cm²

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Sin 30 +cos 60

Posted by Rajkamal Patel 6 years, 6 months ago

CBSE > Class 10 > Mathematics

2 answers

Chētnà Pandey✌️ 6 years, 6 months ago

The answer is √3+√3/2

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Chētnà Pandey✌️ 6 years, 6 months ago

√3/2 + √3/2 = √3/2

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Ap , if the common difference (d)=4 and the seven therm (a7)is 4 then find the first them ?

Posted by Pooja Nangliya 6 years, 6 months ago

CBSE > Class 10 > Mathematics

4 answers

Chētnà Pandey✌️ 6 years, 6 months ago

Ohh sorry? 4=a+6×4. 4=a+24. a=20 Really sorry for a silly mistake?

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Meenakshi Rajput 6 years, 6 months ago

a=-20

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Chētnà Pandey✌️ 6 years, 6 months ago

a7=a+6d =a +6×4=a+24=0 a=-24 then first term is -24

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Puja Sahoo 6 years, 6 months ago

a=-20. Hope it helps you......

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TheHCF of smallest prime number and the smallest composite number ?

Posted by Pooja Nangliya 6 years, 6 months ago

CBSE > Class 10 > Mathematics

4 answers

Prerna Baid 6 years, 6 months ago

The smalest number= 2 The composite numbers =4 2=2×1 4=2×2 The HCF is 2

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Pooja Nangliya 6 years, 6 months ago

The require number 2and 4 Hcf of 2 and 4 is 2 .

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Puja Sahoo 6 years, 6 months ago

The smallest prime number is 2 and composite number is 4,so the h.c.f(2,4) =2.

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Chētnà Pandey✌️ 6 years, 6 months ago

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The distance of a point p (x , y)from the origin

Posted by Pooja Nangliya 6 years, 6 months ago

CBSE > Class 10 > Mathematics

3 answers

Pooja Nangliya 6 years, 6 months ago

Op =[x2+y2)

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Pooja Nangliya 6 years, 6 months ago

Nice

1Thank You

Khanak Sharma 6 years, 6 months ago

Square root of x^2+y^2

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ANSWER

The mean of the following distribution is 18 find the frequency f of class 19 to 21

Posted by Pooja Kumari 6 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Sia ? 6 years, 1 month ago

<th scope="col">Class interval</th> <th scope="col">Frequency f

11-13	3	12	36
13-15	6	14	84
15-17	9	16	144
17-19	13	18	234
19-21	f	20	20f
21-23	5	22	110
23-25	4	24	96
	$\sum f _ { i } = 40 + f$		$\sum f _ { i } x _ { i } = 704 + 20 f$

let the missing frequency is 'f'.
we know that , $Mean= \frac { \sum f _ { i } x _ { i } } { \sum f _ { i } }$

$\Rightarrow 18 = \frac { 704 + 20 f } { 40 + f }$
$\Rightarrow 18(40 + f)=704 + 20f$
$\Rightarrow 720 + 18f =704 + 20f$
$\Rightarrow 2f = 16$
$\Rightarrow$ f = 8

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Csa of frustum

Posted by Kshitiz Narayan 6 years, 6 months ago

CBSE > Class 10 > Mathematics

1 answers

Yogita Ingle 6 years, 6 months ago

In geometry, a frustum is the portion of a solid (normally a cone or pyramid) that lies between one or two parallel planes cutting it.
If we cut a right circular cone by a plane parallel to its base, the portion of the solid between this plane and the base is known as the frustum of a cone.
Curved Surface Area (CSA) = pi * l(R + r)
where
r = radius of smaller circle
R = radius of bigger circle
l = slant height of the frustum

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find the value of √6+√6+√6+......infinity

Posted by Anshika Dixit 6 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Sia ? 6 years, 1 month ago

Let $x = \sqrt { 6 + \sqrt { 6 + \sqrt { 6 + \dots } } }$ ......(i)
$\Rightarrow$ x² = $( \sqrt { 6 + \sqrt { 6 + \sqrt { 6 . . } } } ) ^ { 2 }$ [Squaring both sides]
$\Rightarrow$ x² = $6 + \sqrt { 6 + \sqrt { 6 + \sqrt { 6 + \ldots } } }$
$\Rightarrow$ $x^2 = 6 + x$ [From (i)]
$\Rightarrow$ $x^2 - x - 6 = 0$
$\Rightarrow$ $(x - 3) (x + 2) = 0$
$\Rightarrow$ $x = 3, x = -2$
$\therefore$ x = 3 [ $\because$ x > 0]

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In each corner of a triangular field, a horse is tetherd with a rope of length 7m. Sides of the triangle are 60m, 80m and 100m. Find the area of the field over which horses can graze.

Posted by Ketan Pandey 6 years, 6 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

A cistern

Posted by Harsimar Singh 6 years, 1 month ago

CBSE > Class 10 > Mathematics

1 answers

Sia ? 6 years, 1 month ago

Given
Volume of cistern = $150 \times 120 \times 110 \mathrm { cm } ^ { 3 } = 1980000 \mathrm { cm } ^ { 3 }$
Volume of water = 129600 cm³
Volume of one brick = $22.5 \times 7.5 \times 6.5 \mathrm { cm } ^ { 3 } = 1096.875 \mathrm { cm } ^ { 3 }$

Each brick absorbs one - seventeenth of its volume of water
Volume of water absorbed by one brick = $\frac { 1 } { 17 } \times$ volume of brick

= $\frac { 1 } { 17 } \times 1096.875 \mathrm { cm } ^ { 3 }$

= 64.52 cm³
Let n be the total number of bricks which can be put in the cistern without water overflowing. Then,
Volume of water absorbed by n bricks = $n \times \frac { 1 } { 17 } \times 1096.875 \mathrm { cm } ^ { 3 }$
$\therefore$ Volume of water left in cistern = $= \left( 129600 - \frac { n } { 17 } \times 1096.875 \right) \mathrm { cm } ^ { 3 }$
Since the cistern is filled upto the brim.

Therefore, Volume of the cistern = Volume of water left in the cistern + Volume of bricks
$1980000$ = $129600 - \frac { n } { 17 } \times 1096.875 + n \times 1096.875$
$n \times 1096.875 - \frac { n } { 17 } \times 1096.875 = 1980000 - 129600$
$1096.875 \times \left( n - \frac { n } { 17 } \right) = 1850400$
$1096.875 \times \frac { 16 n } { 17 } = 1850400$
$17550 \times \frac { n } { 17 } = 1850400 \Rightarrow n = \frac { 1850400 \times 17 } { 17550 } = 1792.41$

since the number of bricks cannot be in decimals

therefore, required number of bricks = 1792

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For Ø=30°;Verify that:sin 2ø=2tanø/1+tan2ø

Posted by Ketan Pandey 6 years, 6 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

The equations of the perpenducula bisector of the sides AB and AC of triangle ABC are x-y+5=0,x+2y=0.if A(1,-2),then the equations of the line BC is

Posted by Murali Rekha 6 years, 6 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

If a variable takes the discrete valuesx+4,x-7/2,x -5/2,x -3, x-2,x+1/2,x-1/2,x+5(x>0) then the median is

Posted by Poonam Patil 6 years, 6 months ago

CBSE > Class 10 > Mathematics

1 answers

Poonam Patil 6 years, 6 months ago

How to solve this?

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ANSWER

11/5x-4 - (10/4-5x) Find x

Posted by Anupam Kumar 6 years, 6 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

What is. Line sgmnt

Posted by Shoeb Akhtar 6 years, 6 months ago

CBSE > Class 10 > Mathematics

2 answers

Ram Kushwah 6 years, 6 months ago

A line segment is a piece, or part, of a line in geometry. A line segment is represented by end points on each end of the line segment. A line in geometry is represented by a line with arrows at each end. ... For example, if your end points were A and B, then you would write your line segment AB with a line over the top.

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Neha Jangir 6 years, 6 months ago

Line segment is a line which has 2 end points

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Radha made a picture of an aeroplane with coloured paper .find the total area of paper used.

Posted by Bvj 1728 6 years, 6 months ago

CBSE > Class 10 > Mathematics

3 answers

Neha Jangir 6 years, 6 months ago

Plz tell me the measurment of this que.

2Thank You

Shubhendra Singh ? 6 years, 6 months ago

Sorry but she? only made picture

3Thank You

Shubhendra Singh ? 6 years, 6 months ago

What are the measurements

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ANSWER

How to learn trigonometry formulas on tips?

Posted by Aman Tyagi 6 years, 6 months ago

CBSE > Class 10 > Mathematics

5 answers

Chētnà Pandey✌️ 6 years, 6 months ago

PBP= pandit badri prasad? HHB= Har Har bholey??

1Thank You

Abc . 6 years, 6 months ago

Some people have=(some?sin theta)=(people?perpendicular)/(have?height),sinΦ=P/H......... Curly brown hair=(curly?cos theta)=(brown?base)/(hair?height),cosΦ=B/H....... Tightly pulled back=(tightly?tan theta)=(pulled?perpendicular)/(back?base),tanΦ=P/B....

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Shubhendra Singh ? 6 years, 6 months ago

PBP/HHB Pakistan bhooka pyasa Hindustan hara bhara

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Neha Jangir 6 years, 6 months ago

Like in serieswise p/h =sin B/H =cos P/B = tan and h/p = cosec h/b = sec b/p = cot Pbp/hhb Pandit badri prasad har har bole SIN COS TAN COSEC SEC COT

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Mtror Thardak 6 years, 6 months ago

Just learn formula of sin,cos . Tan can be solved by dividing them . And cot,sec,cosec are there opposite. Like sin30° ÷ cos30°= 1/2 ÷ √3/2 = 1/2 = tan 30°

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A man is 5 times old as his son and sum of the square of their ages ages is 2106 find the ages

Posted by Deepak Kumar 6 years, 6 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Two number are in ratio 5:6 ,if 8 is subtracted from each of the numbers the ratio become 4:5 find two no Solve plz

Posted by Aryan Beniwal 6 years, 6 months ago

CBSE > Class 10 > Mathematics

1 answers

Neha Jangir 6 years, 6 months ago

First no. =4/3 and second no. = 8/5

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ANSWER

Show that 7-√5is irrational give that √5is irrational

Posted by Rishabh Raj Singh 5 years, 3 months ago

CBSE > Class 10 > Mathematics

1 answers

Aryan Beniwal 6 years, 6 months ago

Seven underroot 5 Put equal to a/b so Now underroot 5 is equal to a/7b Therefore a/7b is rationl no So 5 also is a rational no But this contradict that underroot 5 is irrrational So ,our assumption is wrong and 7 underroot 5 is irrational no

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A truck travels at a certain average Speed for a distance of 150 km and then travels a distance of 200 km at an average speed of 20 km/hr more than the first speed. If it takes 5 hours to complete the total journey. Find its first speed.

Posted by Pramod Kumar 6 years, 6 months ago

CBSE > Class 10 > Mathematics

1 answers

Pramod Kumar 6 years, 6 months ago

60 km/hr

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Show that there are infinitely many positive primes

Posted by Kohi . 6 years, 6 months ago

CBSE > Class 10 > Mathematics

5 answers

Kohi . 6 years, 6 months ago

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Simar Simar 6 years, 6 months ago

Its clear

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Simar Simar 6 years, 6 months ago

Proofs that there are infinitely many primes. Well over 2000 years ago Euclid proved that there were infinitely many primes.Well over 2000 years ago Euclid proved that there were infinitely many primes. Since then dozens of proofs have been devised and below we present links to several of these. (Note that [Ribenboim95] gives eleven!) My favorite is Kummer's variation of Euclid's proof.

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Kohi . 6 years, 6 months ago

Abhii tkkk jitna bhi questions pucha ek ka bhi answer nii mila

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Kohi . 6 years, 6 months ago

Please koi jaldi bta doo

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Has cbse uploaded datesheet for 2018-19 class 10th board

Posted by Rushil Jariwala 6 years, 6 months ago

CBSE > Class 10 > Mathematics