Question

Atank is filled by three pipes with uniform flow.The first two pipes operating simultaneously fill the tank in the same time during which the tank is filled by third pipe alone.The second pipe fills the tank 5hours faster than the first pipe and 4hours slower than the third pipe .The time required by the first pipe is:

Answer 1

Time taken by pipe 1 alone is = 15 hours.

Answer 2

Time taken by pipe 1 = 15 hours