If 20 men can do a certain piece of work I n 10 days and one of them starts the work alone and from ….

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If 20 men can do a certain piece of work I n 10 days and one of them starts the work alone and from second day one additional worker joins him every day then in how many days the work will be completed ?

Options :-

1. 19.5 Days
2. 20.5 Days
3. 21.5 Days
4. 14.2 Days
5. 20 Days

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