From a point on a straight road, two cars are driven in opposite directions, one at 22 miles per hour and the other at 62 miles per hour. In how many hours will they be 420 miles apart?
A) 4 hours
B) 6 hours
C) 5 hours
D) Not enough information

Question

Quizplus · Accepted Answer

Since the cars are moving in opposite directions, their speeds add up. So, their relative speed is 22 + 62 = 84 miles per hour. To find the time, divide the total distance by the relative speed: 420 miles / 84 miles per hour = 5 hours.

From a Point on a Straight Road, Two Cars Are