Question

5. 15 men can build a wall in 42 hours. How many workers will be required for the same work in 30 hours.​

Answer 1

Answer:

15 men can build a certain wall in 42 hours

therefore In 1 hour 42×15 workers needed

IT means that in 30 hours.

$(42 \times 15) \div 30 \\ = 21 \: workers \: required.$

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