Question

A car goes at v mph for a hours then goes in the opposite direction at u mph for b hours. How far is the car from where it started at the end? (Hint: Distances are always be positive).

Answer 1

Answer:

(av + bu) miles

Explanation:

Average speed = distance/time

distance = time × average speed

distance from the starting point to the beginning of the opposite direction = a hours × v mph (mph is miles per hour) = av miles

distance from the opposite direction to the end = b hours × u mph = bu miles

distance from where he started to the end = (av + bu) miles