13. 64 men working 8 hours a day plan to complete a plece
of work in 9 days. However 5 days later they find that
they had completed only 40% of the work. They now
wanted to finish the remaining portion of the work in 4
more days. Find the number of hours per day that they
need to work in order to achieve the target.
and Fcan complete a
C
Answers
Answer:
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Given : 64 men working 8 hours a day plan to complete a piece of work in 9 days.
5 days later they find that they had completed only 40% of the work.
They now wanted to finish the remaining portion of the work in 4 more days.
To Find : the number of hours per day that they need to work in order to achieve the target.
Solution:
64 men working 8 hours a day for 5 days
Hence Work done = 64 * 8 * 5 = 64 * 40 hrs
Let say total Work = W hrs
Work Done = 40 % of the work
(40/100) W = 64 * 40
=> W = 64 * 100 hrs
Remaining Work = 64 * 100 - 64 * 40
= 64 * 60 hrs
Remaining days = 4
Work done in a hr = H
Men = 64
Hence Work Done = 64 * 4 * H hrs
64 * 4 * H = 64 * 60
=> 4 * H = 60
=> H = 15
They need to work 15 hrs per day in order to achieve the target.
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