Question

a group of 4 pupils can take 2 weeks to do a certain job.how long will 12 pupils take to complete the job if they work at the same rate​

Answer 1

6 weeks

Explanation:

Set up a proportion where x is the amount of time with 12 pupils:

`(4)/(2)` =
`(12)/(x)`

Cross multiply and solve for x:

4x = 24

x = 6

So, it will take 12 pupils 6 weeks to complete the job.