Question

3 workers can do a job in 28 hours. How many more workers are needed to do this job in 12 hours?

Answer 1

7 workers

Explanation:

`(workers first time)/(workers second time) = (hours second time)/(hours first time)`

`(3)/(x) = (12)/(28)`

cross multiply and it becomes

12x = 3x28

12x = 84

x = 84/12

x = 7 workers

Answer 2

4

Explanation:

3/28=x/12

that is 7 and you need to find how many more workers so you subtract

7-3=4