Choose the One Alternative That Best Completes the Statement or Answers

Choose the one alternative that best completes the statement or answers the question.

Solve the problem.
-A man rode a bicycle for 12 mi and then hiked an additional 8 mi. The total time for the trip was 5 hr. If his biking rate was 10 mph faster than his hiking rate, what was each rate?

A) Biking: 14. mph; hiking: 4.5 mph
B) Biking: 11.5 mph; hiking: 1.5 mph
C) Biking: 12 mph; hiking: 2 mph
D) Biking: 13 mph; hiking: 3 mph