Question
Tap A and Tap B fill a drum of volume 494 liters in 19
minutes. If their efficiencies are in the ratio x:y respectively and B alone takes to fill the cistern 49.4 minutes. Find x-y.Solution
                    A+B         B Time         19   :  49.4 Efficiency    49.4  :    19                          26  :    10 Efficiency of A+B = 26 Efficiency of B = 10 Efficiency of A = 26 – 10 = 16 Ratio = x:y = 16:10 So, x – y = 16 – 10 = 6
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