alleryPipe P is three times as fast as pipe Q, and both fill a tank in 12 minutes. Q alone needs
A36 minutes
B48 minutes
C42 minutes
D60 minutes
Answer & Solution
Correct answer: B. 48 minutes
Rates 3x and x give 4x = 1/12, so x = 1/48 and Q alone takes 48 minutes.
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