Question

Two cars traveled equal distances in different amounts of time. Car A traveled the distance in 4 h, and Car B traveled the distance in 4.5 h. Car B traveled 5 mph slower than Car A.

(The formula R⋅T=D , where R is the rate of speed, T is the time, and D is the distance can be used.)

How fast did Car B travel?

Enter your answer in the box.


___ mph

Answer 1

x = rate in mph

distance (car A) = (x +5) * 4

distance (car B) = x *4.5

(x +5) *4 = 4.5x

4x + 20 = 4.5x

20 = .5x

x = rate = 40 mph

car B traveled at 40 mph