A work force of 420 men with a contractor can finish a certain piece of work in 9 months.how many extra men must he employ to complete the job in 7 months
Answers
Answered by
248
Let the work that is to be done be x
Total time taken by 420 men to complete the certain piece of work = 9 months
X = 420 * 9 = 3780
Total number of men required to complete the same work in 7 months = x / 7
= 3780 / 7 = 540
Total number of men he need to hire = 540 – 420 = 120
Answered by
57
9 months : 420 mens
7 months : x
we have to do cross multiplication then you will get like this ( given below)
9x = 420 * 7
x = 420 * 7
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9
when you cancel 9 and 420 then you will be
140 * 7
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3
your answer would be = 326.6
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