Math, asked by vishalsaw2601sths, 7 months ago

a contractor with a work force of 420 men who can finish a certain piece of work in 9 months . how many extra men must be employ to complete the same job in 7 months .

Answers

Answered by aarjusahu

7

please mark my answer as brainliest

Step-by-step explanation:

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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