Ravi can do a piece of work in 30 days while Prakash can do it in 40 days. In how many days will they finish it together?

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Question:Ravi can do a piece of work in 30 days while Prakash can do it in 40 days. In how many days will they finish it together?

1.17 1/7 days

2.27 1/7 days

3.23 2/7 days

4.16 4/11 days

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  1. Ravi can do a piece of work in 30 days while Prakash can do it in 40 days. In how many days will they finish it together?
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