Question
Tap A and Tap B fill a drum of volume 117 liters in 3
minutes. If their efficiencies are in the ratio x:y respectively and B alone takes to fill the cistern 11.7 minutes. Find x-y.Solution
A+B B Time 3 : 11.7 Efficiency 11.7 : 3 39 : 10 Efficiency of A+B = 39 Efficiency of B = 10 Efficiency of A = 39 – 10 = 29 Ratio = x:y = 29:10 So, x – y = 29 – 10 = 19
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