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It takes 12 hours to fill a swimming pool using two pipes. If the pipe of larger diameter is used for 4 hours and the pipe of smaller diameter is used for 9 hours , only half of the pool is filled. How long would it take for each pipe to fill the pool seperately?

Posted by Akshay Agarwal 6 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

#Miss_Raagini ???? 6 years, 9 months ago

let the time taken by the 1 pipe be x hours and let the time taken by the 2 pipe be y hours. & the in 1 hour the 1 pipe can fill it=1/x the in 1 hour the 2 pipe can fill it=1/y 1/x +1/y = 1/12 -1 4/x = 9/9 =1/2 -2 let 1/x be a and 1/y be b. a+b= 1/12 -3 4a + 9b = 1/2 -4 multiply 3 by 4 and then subtract 5 and 6. 4a +4b=1/3 -5 4a + 9b = 1/2 -6 we get, b=1/30 y=30. sustituting the value of y in eq. 3 a+1/30=1/12 x=20. Hence the 1 pipe would take 20hours and the 2 pipe would take 30 hours.

ANSWER

Find the value secA if sinA = 3/5.

Posted by Ramkrishna Karmakar 6 years, 9 months ago

CBSE > Class 10 > Mathematics

3 answers

#Miss_Raagini ???? 6 years, 9 months ago

5/4 dear.

Akshay Agarwal 6 years, 9 months ago

Ans is 5/4

Harsimran Singh ? 6 years, 9 months ago

5/4

ANSWER

The perimeter of a sector of a circle of radius 5.2 is 16.4 . find the area of the sector

Posted by ##Little Rock Star## 6 years, 9 months ago

CBSE > Class 10 > Mathematics

2 answers

Diksha Kharwal 6 years, 9 months ago

15.6 cm2 is the answer

Puja Sahoo? 6 years, 9 months ago

15.6 cm^2

ANSWER

Hcf of 385

Posted by Zuhra Rashi 6 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Ankit Raj 6 years, 9 months ago

And where's the second number.

ANSWER

Blue print of class 10

Posted by Sachin Khare 6 years, 9 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Write the value of cot^-1÷sin^

Posted by Narendra Mule 6 years, 9 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

find the zeros of polynomial 4 root 3 X square + 4 root 3 x minus 3 root 3

Posted by Yuvraj Chahal 5 years, 8 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

BL and CM are median of a triangle ABC right angled at A . Prove that 4(BL square +CMsquare) =5BC square

Posted by Chhaya Patel 6 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Noor Mehta 6 years, 9 months ago

Ncert example no. 13 page no.148. Pls check

ANSWER

What is difference between roots and zeros

Posted by Harshit Kesharwani 6 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Ramesh Singh 6 years, 9 months ago

Both r same

ANSWER

If2x=secAand2/x=tanA then2(x2-1/x2)=?

Posted by Ankit Yadav 6 years, 9 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

is it compulsory to attempt questions in serial wise manner?

Posted by Vishakha Singh? 6 years, 9 months ago

CBSE > Class 10 > Mathematics

3 answers

Gungun ? 6 years, 9 months ago

No....but if yu attempt in serial wise manner..then it will b easy for d examiner 2 check yur sheet...so better 2 do in series

Siddhartha Jain 6 years, 9 months ago

Actually if we do answer in series to checker ko acha lagta h au unhe copy check ke rs bhi milte hn to wo chahte hn ki jyada se jyada copy check kren aur series m krne se sir thodi loose checking bhi krte hn.

Diksha Kharwal 6 years, 9 months ago

Noo

ANSWER

If a2,b2,c2 are ap, then prove that a/b+c,b/c+a,c/a+b are also in ap

Posted by Sourav Rathee 6 years, 9 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

What is co prime numbers ??

Posted by Vaibhav Verma 6 years, 9 months ago

CBSE > Class 10 > Mathematics

3 answers

Siddhartha Jain 6 years, 9 months ago

Ya vaibhav- diksha is right

Diksha Kharwal 6 years, 9 months ago

Eg-1, 5,7,11and so on

Diksha Kharwal 6 years, 9 months ago

Two natural numbers are called co prime numbers if there hcf is one not necessarily prime

ANSWER

Exercise 6.4 question no. 7

Posted by Atul Kumar 6 years, 9 months ago

CBSE > Class 10 > Mathematics

3 answers

Diksha Kharwal 6 years, 9 months ago

Yes Siddharth is saying right

Siddhartha Jain 6 years, 9 months ago

Actually es ques. M bs diagram banana thoda sa complicated h baaki simple h

Diksha Kharwal 6 years, 9 months ago

Its too easy aap previous year paper k solutions m jao vhaa apko mil jayega

ANSWER

Prove that 12n is not end with digit 0 and 5

Posted by Shri Krishan 6 years, 9 months ago

CBSE > Class 10 > Mathematics

3 answers

Diksha Kharwal 6 years, 9 months ago

Thanks manisha

Usha ❤❤❤ 6 years, 9 months ago

Its correcy diksha

Diksha Kharwal 6 years, 9 months ago

Because 12 has not 2 and 5 its prime factor so 12n can't end with digit 0 and 5

ANSWER

In figure , AB||DE and BC||EF .prove that AC||EA

Posted by Kirankalra Kalra 6 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Diksha Kharwal 6 years, 9 months ago

What is the figure???

ANSWER

(p,q),(m,n),and (p-m,q-n)are collinear, show that pn=qm

Posted by Ram Gopal 6 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Sia ? 6 years, 4 months ago

Given points are collinear. Therefore

[p {tex}\times{/tex} n + m(q - n) + (p - m) q] - [m {tex}\times{/tex} q + (p - m) n + p (q - n)] = 0
{tex}\Rightarrow{/tex} (pn + qm - mn + pq - mq) - (mq + pn - mn + pq - pn) = 0
{tex}\Rightarrow{/tex} (pn + p q - mn) - (mq - mn + pq) = 0
{tex}\Rightarrow{/tex} pn - mq = 0
{tex}\Rightarrow{/tex} pn = qm

ANSWER

board give same mark for question or it may veriy

Posted by Nithya Nagaraj 6 years, 9 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

yes they follow this blue print blue print of maths send me

Posted by Nithya Nagaraj 6 years, 9 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

did board following blue print of maths ?

Posted by Nithya Nagaraj 6 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Diksha Kharwal 6 years, 9 months ago

Yess

ANSWER

How many multiples of 4 lie between 10& 250

Posted by Prabhat Bolia 6 years, 9 months ago

CBSE > Class 10 > Mathematics

3 answers

Diksha Kharwal 6 years, 9 months ago

Put a=12 ,d=4 and an=248

Rohit Mandal 6 years, 9 months ago

A.p series 12,16,20.............248

Diksha Kharwal 6 years, 9 months ago

60

ANSWER

Prove that a quadrilatera and a circumscribe

Posted by Anil Verma 6 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Sahil Rajput 6 years, 9 months ago

Ye to 12.2 ka hy ncert

ANSWER

The height of cone is 120 cm.A small cone is cut off at the top by a plane parallel to the base and its volume is 1/64th of the volume of orignal cone. The height from the base at which the section is made is

Posted by Krishi Khatri 6 years, 9 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Question 5 of exercise 10.2

Posted by Khushi Modi 6 years, 9 months ago

CBSE > Class 10 > Mathematics

2 answers

Samyukta ... 6 years, 9 months ago

Page number 208 aur 209

Samyukta ... 6 years, 9 months ago

Ismai theorem 10.1 prove krna hai

ANSWER

If (cosec o- sin0)=m^3 and( secO-cos0)=n^3,then show that m^4n^2+m^2n^4=1

Posted by Khushi Modi 6 years, 9 months ago

CBSE > Class 10 > Mathematics

3 answers

Khushi Modi 6 years, 9 months ago

Then give the answer

Khushi Modi 6 years, 9 months ago

So please tell how to solve this question

Anikait Garg 6 years, 9 months ago

So easy

ANSWER

two right triangles ABC and DBC are drawn on the same hypotenuse BC and on the same side of BC if AC and BD intersect at p prove that AP into PC is equals to b b into BD

Posted by Krishna Kant Mishra 6 years, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Sia ? 6 years, 4 months ago

Given: Right triangles {tex}\triangle ABC{/tex} and {tex}\triangle DBC{/tex} are drawn on the same hypotenuse BC on the same side of BC.
Also, AC and BD intersect at P.
To Prove: {tex}A P \times P C = B P \times P D{/tex}
Proof: In {tex}\triangle BAP{/tex} and {tex}\triangle CDP{/tex}, we have
{tex}\angle B A P = \angle C D P = 90 ^ { \circ }{/tex}
{tex}\angle B P A = \angle C P D{/tex} (vertically opposite angles)
{tex}\therefore \quad \triangle B A P \sim \triangle C D P{/tex} [by AA-similarity]
{tex}\therefore \quad \frac { A P } { D P } = \frac { B P } { C P }{/tex}
{tex}\Rightarrow A P \times C P = B P \times D P{/tex}
{tex}\Rightarrow A P \times P C = B P \times P D{/tex}
Hence, {tex}A P \times P C = B P \times P D{/tex}.

ANSWER

A highway leads to the foot of 300m high tower.An observatory is set at the top of the tower. It sees a car moving towards it at an angle of depression 30°.after 15 seconds angle of depression becomes 60°. (a)find the distance travelled by the car during this time (b)How this observatory is helpful to regulate the traffic on the highway

Posted by Tanishq Tannu 6 years, 9 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

A girl empties a cylindrical bucket,full of sand ,of base radius 18 cm and height 32 cm ,on the floor to form a conical heap of sand.If the height of this conical heap is 24 cm,then find its slant height correct upto one place of decimal

Posted by Tanishq Tannu 6 years, 9 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

What is 0

Posted by Suman Das 6 years, 9 months ago

CBSE > Class 10 > Mathematics

4 answers

Honey ??? 6 years, 9 months ago

Mid no. Of all integers

Samyukta ... 6 years, 9 months ago

Natural number

Samyukta ... 6 years, 9 months ago

Integer

Samyukta ... 6 years, 9 months ago

Whole number

ANSWER

Which of the following pairs of linear equations are consistent inconsistnent?if consistent obtain the solution graphically 2x-2y-2=0,4x-4y-5=0

Posted by Sujal Dhingra 6 years, 9 months ago

CBSE > Class 10 > Mathematics

1 answers

Honey ??? 6 years, 9 months ago

Inconsitent

ANSWER

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