Question : Pipes A and B together can fill an empty tank in
Option 1: 6
Option 2: 5
Option 3: 5.5
Option 4: 4.5
Correct Answer: 5
Solution :
Given: Pipes A and B together can fill an empty tank in
A takes 3 minutes more than B to fill the tank.
Let in
So, the complete tank can be emptied in
According to the question,
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Pipe B takes 12 minutes to empty the entire tank.
The amount of time pipe A needs to empty a full tank is (12 + 3) = 15 minutes
The time in which A alone would fill one-third part of the tank
Hence, the correct answer is 5.
