Pipes & Cisterns Mcqs

Q.  Three pipes of same capacity can fill a tank in 8 hours. If there are only two pipes of same capacity, the tank can be filled in___________?

a. 17 hours
b. 12 hours
c. 16 hours
d. 24 hours


ANSWER: See Answer
 
The part of the tank filled by three pipes in one hour = 1/8

=> The part of the tank filled by two pipes in 1 hour = 2/3 * 1/8 = 1/12.
The tank can be filled in 12 hours.
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