Respuesta :
Answer:
55 mph
Step-by-step explanation:
the speed of car A is [tex]\frac{D}{2,4}[/tex] (mph)
the speed of car B is [tex]\frac{D}{4}[/tex] (mph)
we have the equation:
[tex]\frac{D}{2,4}-\frac{D}{4}=22\\[/tex]
=> 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