Question

An intel pipe can fill an empty tank in 10hr .it was opened at 9a.m and after one hour another outlet pipe was opened .if the outlet pipe can empty the tank in 15hrs then find the time after which the tank will be half filled​

Answer 1

Answer:

If an inlet pipe takes 4 hrs to fill and an outlet pipe takes 6 hrs to empty then when both the pipes are open then the tank will be half-filled in 6 hrs. Also, an outlet pipe takes 6 hrs to empty the tank. Thus, the tank will be half-filled in 6 hours.

Answer 2

Answer:

Time taken by the intel pipe to fill the tank = 10 hr

Work done in 1hr= 1/10

Time taken by the outlet pipe to empty the tank= 15hr

Work done in 1 hr= 1/15

∴ Time taken for the tank to be filled= 1/10 - 1/15 = 1/30 = 30 hrs

∴ Time taken for the tank to be half filled= 15 hrs

HOPE IT HELPS!!