Question

A and B can complete a piece of work in 13 and 17 days

AB 1317 221 T.W 1713 Working fashion A, B, A, B, 2 days 30 units 14 days 210 units 15 days 11 17 days 221 units Total time 141117 141117 days

respectively. A begins to do the work, and they work alternatively one at a time for one day each. The whole work will be completed in.

A 3

B 1

C 4

D 2

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