Question

Aaron starts walking at a rate of 3 mi/h on a road toward a store 10 mi away. Zhang leaves the store when Aaron starts walking, and he walks toward Aaron along the same road at 2 mi/h. How many hours will pass before they meet?
A. 1.5 h
B. 10 h
C. 2 h
D. 3 h

Answer 1

They are 10 mi apart and walk toward each other at combined speed 3 + 2 = 5 mi/h.
Time = distance / relative speed = 10 / 5 = 2 hours.

Answer: C.