Question

. Two water taps together can fill a tank in 9
10
hours. The tap of larger diameter
hours less than the smaller one to fill the tank separately. Find the time in which
can separately fill the tank.
An express train takes 1 hour less than a passenger train to travel 132 km between​

Answer 1

Let the time taken by the smaller pipe to fill the tank be x hr.

Time taken by the larger pipe = (x â 10) hr

Part of tank filled by smaller pipe in 1 hour =

Part of tank filled by larger pipe in 1 hour =

It is given that the tank can be filled in hours by both the pipes together. Therefore,

Time taken by the smaller pipe cannot be = 3.75 hours. As in this case, the time taken by the larger pipe will be negative, which is logically not possible.

Therefore, time taken individually by the smaller pipe and the larger pipe will be 25 and 25 â 10 =15 hours respectively.