Answer / guest

The tank will be full in 16 minutes.

In one minute,

pipe A can fill 1/30 part of the tank.

pipe B can fill 1/24 part of the tank.

pipe C can empty 1/80 part of the tank.

Thus, the net water level in one minute is

= 1/30 + 1/24 - 1/80

= 15/240 part of the tank

Hence, the tank will be full in 240/15 i.e. 16 minutes.

Answer / mithilesh.patidar

obviasly 16 minutes.............b'cas
in 1 minute a can fill the tank=1/30
in 1 minute b can fill the tank=1/24
then both fill the tank in 1 minute=1/30+1/24
=54/30*24
=3/40
c can empty the tank in 1 minute=1/80
then pipe will fill in=3/40-1/80
=1/16
hence
for fill the full tank it takes 16 minutes....

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