Question

100 POINTS

Two cars traveled equal distances in different amounts of time. Car A traveled the distance in 2.4 h, and Car B traveled the distance in 4 h. Car A traveled 22 mph faster than Car B.

How fast did Car A travel?

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

Answer 1

It 6 and -6 the answer

Answer 2

55 mph

Explanation:

the speed of car A is
`(D)/(2,4)` (mph)

the speed of car B is
`(D)/(4)` (mph)

we have the equation:

`(D)/(2,4)-(D)/(4)=22\\`

=> 4D - 2,4D = 22.4.2,4 =211,2

<=> 1,6D = 211,2

<=> D = 132 (m)

=> the speed of car A is 132:2,4 = 55 mph