A contractor employed 210 workers to unload goods from a ship in 18 days. After 4 days it was found that only 1/6 part of the work was done. How many more men had to be employed to finish the work in time?
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Answer:
Given that,
Let the total work to be done =1
210 men build a house in 60 days
each man 1 day work =
210×60
1
After 12 days,
Total work done by 210 workers in 12 days
=
210×60
1
×210×12=
5
1
70 extra workers joined the work now
total workers =280
Remaining work =1−
5
1
=
5
4
.............(1)
Let the remaining work finished in next X days
Total work done by 280 workers in X days =
210×60
1
×280×X ..................(2)
Equation (1)=(2)
5
4
=
210×60
1
×280×X
X=36 Days
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