Question

18 workers can build a wall in 48 hours how many workers will be required in the same work in 32 hours​

Answer 1

The fraction of work done each hour by one worker is 1/15 x 1/48 = 1/720.

In 30 hours one worker could do 30 x 1/720 = 1/24 of the work, so you will need 24 workers to do the work in 30 hours.

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Answer 2

12 workers will be needed to complete the wall in 32 hours