A and b can fill a cistern in 7.5 minutes and 5 minutes respectively and c can carry off 14 litres per minute. if the cistern is already full and all the three pipes are opened, then it is emptied in 1 hour. how many litres can it hold?
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Given data - A and B can fill up the cistern in 7.5 minutes & 5 minutes respectively. C can fill up 14 liters per minute.
The capacity of cistern is denoted as l liters. Water filled in one hour = l/7.5 * 60 + l/5*60 = 20 l.
Water removed in one hour = 14x60. Since, the tank was full initially thus, l + 20l – 14X 20 = 0. L= 40 liters.
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