Tap A and Tap B fill a drum of volume 189 liters in 7 minutes. If their efficiencies are in the ratio x:y respectively and B alone takes to fill the cistern 18.9 minutes. Find x-y.
A+B B Time 7 : 18.9 Efficiency 18.9 : 7 27 : 10 Efficiency of A+B = 27 Efficiency of B = 10 Efficiency of A = 27 – 10 = 17 Ratio = x:y = 17:10 So, x – y = 17 – 10 = 7
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