A pipe can fill a cistern in 16 hours After half the tank is filled three more similar taps are open...........

Quantitative Aptitude ( CCS) Pipes&cistern

A pipe can fill a cistern in 16 hours. After half the tank is filled, three more similar taps are opened. What is the total time taken to fill the cistern completely?

3 hours

2 hours

9 hours

4 hours

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Explanation:

Answer & Explanation
Answer – C. 9 hours
Explanation :
In One hour pipe can fill = 1/16
Time is taken to fill half of the tank = 1/2 * 16 = 8 hours
Part filled by four pipes in one hour = (8*1/16) = 1/2
Required Remaining Part = 1/2
Total time = 8 + 1 = 9