Question

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

Answer 1

17 workers will be required

Answer 2

15 workers can build a wall in 48 hours.
15 * 48 = 720 man-hrs required to complete the wall
:
how many workers will be required to do the same work in 30 hours
let m = no. of men required
30m = 720
m = 720/30
m = 24 men