A and B together can complete a task in 7 days. B alone can do it in 20 days. What part of the work was carried out by A? I. A completed the job alone after A and B worked together for 5 days. II. Part of the work done by A could ha ?->(Show Answer!)

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A and B together can complete a task in 7 days. B alone can do it in 20 days. What part of the work was carried out by A? I. A completed the job alone after A and B worked together for 5 days. II. Part of the work done by A could ha ?->(Show Answer!)

Question Set

1. A and B together can complete a task in 7 days. B alone can do it in 20 days. What part of the work was carried out by A? I. A completed the job alone after A and B worked together for 5 days. II. Part of the work done by A could have been done by B and C together in 6 days.

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By: guest on 01 Jun 2017 05.49 pm

B's 1 day's work = 1 20 (A+ B)'s 1 day's work = 1 7 I. (A + B)'s 5 day's work = 5 7 Remaining work = 1 - 5 = 2 . 7 7 2 work was carried by A. 7 II. is irrelevant. Correct answer is (A).

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