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A and B together can complete a particular task in 8 days. If B alone can complete the same task in 10 days, how many days will A take to complete the task if he works alone ? |
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Answer» 28 `1/x + 1/10=1/8` ltbgt `1/x = 1/8 - 1/10 + (10-8)/80 = 2/80 =1/40` `x=40` Alternate Solution: If total work = 80 units Then in 1 day (A+B) will do `80/10 =10` UNIT of work `therefore` A does 2 unit of work each day `therefore` A REQUIRES `80/2 = 40` days to COMPLETE work |
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