Question
Pipe 'A' fills half tank in 18 minutes. Pipe 'B' is 5
times as efficient as A. Find percentage of tank filled by both in 6 minutes.Solution
Full tank time = 18 × 2 = 36 minutes A’s efficiency = x units/min Tank capacity = 36x units B’s efficiency = 5x units/min Work in 6 minutes = (x + 5x) × 6 = 36x units Percentage = (36x / 36x) × 100 = 100%
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