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A and b can complete a work alone in ,18 days and 24 days respectively.if b started work alone and after 3 days a also joined then in how many days whole world will be completed. |
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Answer» Let A work for x days In x days , work by A = x/18 work Time given by B = x + 3 days In x +3 days, work by B = x+3/24 work x/18 + x+3/24= 1 7X + 9/72 = 1 7x + 9 = 72 ]7x = 72 - 9 = 63 x = 63/7 = 9 days |
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