There are 8 filling pipes each capable of filling a cistern alone in 26 minutes and 6 emptying pipes each capable of emptying a cistern alone in 24 minutes. All pipes are opened together and as a result, tank fills 27 litres of water per minute. Find the capacity of the tank.
e)None of these
ANSWER: 468 L
Firstly we have to calculate one minute work for all pipes together. The equation is :
8/26 – 6 / 24 = 3/52 for a minute all pipes together. Then calculate tank capacity.
if 3/52 = 27 litres then 52/52 = 27 / (3/52) = 468 L