A contractor employs a work force of 600 men to complete a project in 8 months. He was asked to complete the work in 6 months. How many extra workers should he employ?
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0
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Answer:
Men Time
420 9 months
x 7 months
As the number of workers is inversely proportional to time taken:
420×9=x×7⟹x=
7
420×9
=540
∴ extra men needed: 540−420=120
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