A contractor applied 150 men to build a house in 45 days after 9 days he was joined by 50 more men .How many day will the remaining work be finish?
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210 men can complete the remaining work in 48 days
So,we have to find out how many days 280 men can do (210+70 more men)
=210×48/280
=36
Therefore 280 men can complete the remaining work in 36 days.
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