A group of N people worked on a project. They finished 35% of the project by working 7 hours a day for 10 days

Question

A group of N people worked on a project. They finished 35% of the project by working 7 hours a day for 10 days. Thereafter, 10 people left the group and the remaining people finished the rest of the project in 14 days by working 10 hours a day. Then the value of N is

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Accepted Answer

140. Let the unit of work done by 1 man in 1 hour and 1 day be 1 MDH unit (Man Day Hour). Thus, in 7 hours per day for 10 days, the work done by N people = N × 7 × 10 N	imes\ 7	imes\ 10 N × 7 × 10 MDH units. Since this is equal to 35% of the total work, 35% of the total work = N × 7 × 10 N	imes\ 7	im