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Quantitative Aptitude

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Work and Time

Question
18 out of 25
 

A cistern can fill by pipe A and B in 4 hours and 6 hours respectively. When filling the tank can be emptied by pipe C in 8 hours. If all the pipe were turned on the same time the cistern will be full in



A 3 hr 18 min.
B 3 hr 48 min.
C 3 hr 42 min.
D 3hr 26 min.
E 3 hr 30 min.

Ans. D A 4 hour 6 unit

B 6 hour 4 unit

C 8 hours 3 unit

Let work be 24 unit then

A, B ,C together do ( 6+ 4 -3) = 7 unit

So it filled in hours

= 3hour = 3 hour 26 min

Work and Time Flashcard List

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