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Question 1:
Two pipes A and B can fill a tank in 12 and 24 minutes respectively. If both the pipes are used together,
how long will it take to fill the tank?
A. 9 min
B. 8 min
Feedback Tank can be filled by pipe A in 12 minutes and pipe B in 24minutes.
=> Part filled by A in 1 minute= 1/12
=> Part filled by B in 1 minute= 1/24
=> Part filled by both in 1 minute= 1/12 + 1/24
= 3/24=1/8
Time taken to fill the entire tank = 8 minutes
C. 7 min
D. 4 min

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