Jim earns x dollars in h hours. How many dollars will he earn in (h+20) hours

The quickest answer would be 133. (3) %x

Step-by-step explanation:

If we consider the volume of work is constant then in 20 min he is supose to earn 1/3 of what he earns in an hour (if he is not paid by the hour, that is!)

If he is paid by the hour then he would earn $2x