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Let tap ‘A’ fill the tank and tap ‘B’ empty the tank. Taking LCM of 14 and 21 = 42 Efficiency of A = 3 Efficiency of (A – B) = 2 Efficiency of B = 3 – 2 = 1 Tap B will empty the tank = 42/1 = 42 So, tap B will empty the tank in 42 hours.
‘The Story of My Experiments with Truth’ was written by:
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