Question 40569
If 4 workers can paint 5 trucks 1 hour, how many will be needed to paint 200 trucks in 8 hours?

If 4 workers can paint 5 trucks in 1 hour
 4 workers = 5 trucks/ 1 hr.
Divide both sides by 4 to get 
 1 worker = (5/4) truck/ 1 hr.
  200/(5/4)= 160
160 workers = 160(5/4)  trucks/ 1hr
160 workers = 200 trucks/ 1 hr.
 20 workers = 200 trucks/ 8hr.
Cheers,
Stan H.