Question
An inlet pipe fills a water tank in 50 minutes and an
outlet pipe empties the tank in 75 minutes. How much time will both take to fill half the tank when opened together?Solution
ATQ,
Let total tank capacity be 150 litres (LCM of 50 and 75)
Inlet efficiency = 150 ÷ 50 = 3 litres/minute
Outlet efficiency = 150 ÷ 75 = -2 litres/minute
Required time = (0.5 × 150) ÷ (3 - 2) = 75 minutes
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