Question

please help me solve this question​

Answer 1

Answer:

Pipe1 = 20 hrs   and Pipe2 = 30 hours.

Step-by-step explanation:

Let's consider, that,

Pipe 1 takes x hours to fill.

Therefore, in 1 hours,     1/x part will be filled.

Pipe2 takes, y hours to fill.

Therefore, in 1 hour, 1/y part will be filled.

Thus, 1/x + 1/y = 1/12        ( 1/12 because it's in 1 hour)

Taking 1/x = m   and 1/y = n,

we get,  m + n = 1/12      ----1

No, by the second condition,

4/x + 9/y = 1/2

4m + 9n = 1/2      ----2

Solving equations 1 and 2,

m = 1/20  and n = 1/30.

Therefore, x( pipe1) = 20 hours   and y(pipe2)  =    30 hours

HOPE THIS HELPS YOU...