Question

One pipe can fill a tank three times as fast as another pipe. if together the two pipes can fill the tank in 36 minutes, then the slower pipe alone will be able to fill the tank in: indiabix

Answer 1

we assumed it takes t1 time to fill the tank for pipe 1.

so rate = V/t1

rate of second pipe is 3 time rate of first =3V/t1.

now combined rate = V/36

As given

but combined rate is also equal to r1+r2

substituting you get the answer.

Then, you get the answer - 144 minutes.

For , solution see in the pic ,I have attached .