Two cars start at the same point and travel in the same direction at average speeds of 65 miles per hour and 40 miles per hour. How much time (in hours)must elapse before the two cars are 87.5 miles apart?
A) 3.5 hours
B) 3.49 hours
C) 1.35 hours
D) $0.83$ hour
E) $2.19$ hours

Question

Quizplus · Accepted Answer

The relative speed between the two cars is $65 - 40 = 25$ miles per hour. To find the time it takes for them to be 87.5 miles apart, divide the distance by the relative speed: $87.5 \div 25 = 3.5$ hours.

Two Cars Start at the Same Point and Travel in the Same