Question
Pipe 'A' alone takes 30 minutes to fill half of the
tank. Pipe 'B' is twice as efficient as pipe 'A'. Find the percentage of the tank filled by both in 10 minutes.Solution
Full tank time = 30 × 2 = 60 minutes A’s efficiency = x units/min Tank capacity = 60x units B’s efficiency = 2x units/min Work in 10 minutes = (x + 2x) × 10 = 30x units Percentage = (30x / 60x) × 100 = 50%
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