There are 4 filling pipes and 3 emptying pipes capable of filling and emptying in 12 minutes and 15 ...........

Quantitative Aptitude ( CCS) Pipes&cistern

There are 4 filling pipes and 3 emptying pipes capable of filling and emptying in 12 minutes and 15 minutes respectively. If all the pipes are opened together and as a result they fill 10 litres of water per minute. Find the capacity of the tank ?

65ltr

70ltr

75ltr

80ltr

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Explanation:

Answer & Explanation
Answer – 75ltr
Explanation :
(4/12 – 3/15)*t = 1
t = 15/2 minute – in this time the tank will be filled. So the capacity = (15/2)*10 = 75 litre