Question

Does anyone know how to solve this? A motorist and a bicyclist leave the same place and proceed in opposite directions. If the bicycle is traveling 15 mph and the auto is traveling 55 mph, in how many hours will they be 140 miles apart?

Answer 1

3.5

Explanation:

The speed difference is 40 mph

then divide the distance by the speed difference and you get 3.5

Answer 2

they will be 140 miles apart in 2 hours

Explanation:

in one hour they will be 70 miles apart since 15 + 55 = 70 and then they get 70 more miles apart in the second hour and 70 + 70 = 140 so 2 hours