Question

if 15 workers can build a wall ib 48 hours how many workers will be required to do the same work in 30 hours.​

Answer 1

ANSWER:

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.