A contractor employed 210 men to build a house in 60 days. After 12 days, he was joined by 70 more men. In how many days will the remaining work be finished?

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Solution

Initially, the contractor had 210 men for 60 days. After 12 days, 70 more men joined.

210 men can finish the work in 48 days
1 man can finish the work in 210 $\times$ 48 days
Now, 280 men can finish the work in $\frac{210 \times 48}{280}$ days = 36 days.

Hence, it will take 36 days to finish the remaining work.

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A contractor employed 210 men to build a house in 60 days. After 12 days, he was joined by 70 more men. In how many days will the remaining work be finished?

Initially, the contractor had 210 men for 60 days. After 12 days, 70 more men joined.210 men can finish the work in 48 days1 man can finish the work in 210×48 daysNow, 280 men can finish the work in 210×48280 days = 36 days.Hence, it will take 36 days to finish the remaining work.