Two workers are stacking cans on to a shelf in a shop. The workers lift the same number of
identical cans on to the same shelf from the same level.
Worker P takes 3.0 minutes to lift the cans. Worker Q takes 4.0 minutes to lift the cans.
Which statement about the workers is correct?
A Worker P develops less useful power than worker Q.
B Worker P develops more useful power than worker Q.
C Worker P does less useful work than worker Q.
D Worker P does more useful work than worker Q.