Math, asked by himanshu439197, 2 months ago

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 baiukkd98

4

Answer:

120

Step-by-step explanation:

As the number of workers is inversely proportional to time taken:

420×9=x×7⟹x= 7420×9/7 =540

∴ Extra men needed: 540−420=120

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