Question

Pipe x can fill the tank in 25 minutes while pipe y can empty it in 75 minutes . In how much time will the tank get filled when both the pipes are opened simultaneously

Answer 1

Step-by-step explanation:

In every 2 or two minutes, portion of tank filled = (1/20) — (1/30) = 1/60.

After (57*2)=114 minutes, portion of tank filled = (57/60).

And in the 115th minute, Pipe A fills (1/20) or (3/60) portion of tank.

So totally (57+3)/60 or 60/60 portion or tank is full after 115 minutes. Answer.