The amount of work done by a man on nth day after starting the work is n times to that can be done on the first day. If 8 men start the work, it can be completed in 10 days.If the work has to be completed in 4 days, how many men have to work? …

The amount of work done by a man on nth day after starting the work is n times to that can be done on the first day. If 8 men start the work, it can be completed in 10 days.

If the work has to be completed in 4 days, how many men have to work?

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