Question

if 15 workers need to build a wall in 48 hours how many workers will build the same wall in 30 hours

Answer 1

(man ×hour×days)÷work done =(man ×hour×days)÷workdone
so (15×48)÷x = (man ×30)÷x
so man = (15×48)÷30 = 24

Answer 2

Answer:If 15 workers can build a wall in 48 hours how many workers will be required to build the same wall in 30 hours?

Given ;-

15 Works can build a wall in 48 hours.

To find the number of workers required to build the same wall in 30 hours ;-

This is a case of inverse proportion where time is decreasing and number of workers is increasing.

So ,

Let the number of workers be "y"

Then ,

=> 15 : 48 :: y : 30

=> y = 15 × 48 / 30

=> y = 24

Therefore ,

24 workers will be required to build the same wall in 30 hours.