Question

Write the rate as a unit rate.

Peter Saltwood can paint 140 doors in 7 hours, while Carl Kepler can paint 42 doors in 4 hours. Who can paint doors faster, Peter or Carl?
A.

Carl

B.

Peter

Answer 1

It takes peter 20 min a door and Carl 10.5 min a door.

Answer 2

Peter - 20 door per hour
Carl - 10.5 door per hour
Therefore, Peter paint faster.

Answer 3

P: 140/7 = 20 d/ hr
C: 42/4 = 10.5 d/hr
-> Peter is faster