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Tap A alone can fill the tank in = 8 hours. Tap B alone can fill the tank in = (8/1) × 2 = 16 hours Tap C alone can empty the tank in = x hours (A + B +C) together can fill the tank in = 6 × (8/5) = 48/5 Taking LCM of 8, 16 and 48/5 =144 Efficiency of Tap A = 18 Efficiency of Tap B = 9 Efficiency of Taps (A + B +C) = 15 Efficiency of Taps (A +C) = 15 – 9 = 6 Tap A and C together take to fill 25% part of the tank in, => (25/100) × (144/6) = 6 hours
Absolute alcohol is prepared from rectified spirit by using the following process :
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