Question

it takes 12 hours to fill a swimming pool using two pipes

Answer 1

Answer:

Really?! ok.Is it a Math question?

Step-by-step explanation:

The solution would be like this:-

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 pipe1 can fill it=1/x

the in 1 hour the pipe2 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.

substituting the value of y in eq. 3

a+1/30=1/12

x=20.

Hence the pipe1 would take 20hours and the pipe2 would take 30 hours.

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