Question
Pipe A and Pipe B together can fill the tank in 20
hours. The capacity of the pipe A is 40% of the capacity of the pipe B. How much time will pipe B alone take to fill the tank.Solution
Capacity of the pipe A = 40/100 × Pipe B Pipe A /Pipe B = 2/5 Efficiency of pipe A = 2 units Efficiency of pipe B = 5 units Total work = 20 × (2+5) = 140 units Time taken by Pipe B to fill the tank = 140/5 = 28 hours
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