Question

If 56 workers can build a wall in 180 hours, how many workers will be required to do the same work in 70 hours?

Answer 1

Workers: Hours:: Workers: Hours

   56     :    180  ::     x       :   70

∴ By inverse proportion

56 × 180 = x × 70

`⇒"x"=(180xx56)/70`

= 144 workers