A can complete a piece of work in x days and B can do the same piece of work in y days. If B starts working a day after

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A can complete a piece of work in x days and B can do the same piece of work in y days. If B starts working a day after A and then they work together, in how many days can they complete the work?

1. x = 100
2. x: y = 2: 1


OA C

Source: e-GMAT
Source: — Data Sufficiency |