Question

11. Three men can build a wall in 10 hours. How

many men would be needed to build the wall in
7 hours?

Answer 1

Man-hours to build the wall: 3 * 10 = 30

:

let m = no. of men required to do it 7.5 hrs

7.5m = 30

m =
`(30)/(7.5)`

m = 4 men to build it in 7.5 hrs

Explanation: