Previous Year Questions

Let C be the capacity of inlet valve.

Capacity of outlet valve = C + 10.

Hence,

Time taken to fill tank = 3600/C.

Time taken to empty tank = 3600/ (C + 10).

From given condition we get,

(3600/C) -(3600/(C + 10)) = 12

On solving for C we get,

C = 50 or -60

As time will never be negative.

C = 50

Capacity of Outlet valve = 50 + 10

= 60 unit/min