Question

pls solve this word problem..please..

Answer 1

For volume V of the pool,

the time taken by the pipe 1,2 and 3 respectively are:
(x+5), x and (x-5) hours.

And volume they can fill on the behalf of volume V are:
=> V/(x+5), V and V/(x-5) respectively.


Now given that,
time taken by third pipe is equal to the sum ofthe first two pipes.
Therefore,
V/(x+5) + V/x = V/(x-4)
Solving we get,
x = 10 and -2
Hence,
time required by each pipe to fill the pool is:
10, 15 and 6 hours.