Three taps A, B and C can fill a tank in 12, 15 and 20 ho... — Answer & Explanation | PrepBeePakistan

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MEDIUMENGLISHMathematics

Three taps A, B and C can fill a tank in 12, 15 and 20 hours respectively. If A is open all the time and B and C are open for one hour each alternately, the tank will be full is_______?

Correct answer: C

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