A contractor undertakes to dig a canal,6kilometre long in 35 days and employed 90 men. He finds that after 20 days only 2 km of canal have been completed.how many more men must be employed to finish the work in time?
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In 20 days 2000 meters work is done by 90 men.
So work capacity of 1 man = 2000 m / (20 days * 90 men) = 10/9 meter per day per man
Work remaining = 6 000 m - 2000 m = 4000 m
Days remaining = 35 days - 20 days = 15 days
One man can do in 15 days, work = 10/9 * 15 = 50/3 meters
Number of men needed = work remains / work capacity of one man
= 4000 / (50/3) = 240 men needed
So work capacity of 1 man = 2000 m / (20 days * 90 men) = 10/9 meter per day per man
Work remaining = 6 000 m - 2000 m = 4000 m
Days remaining = 35 days - 20 days = 15 days
One man can do in 15 days, work = 10/9 * 15 = 50/3 meters
Number of men needed = work remains / work capacity of one man
= 4000 / (50/3) = 240 men needed
tokaians:
as the question says
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