Answer:
Car A: 40 mph
Car B: 50 mph
Step-by-step explanation:
For the same travel time, the ratio of speeds is the same as the ratio of distances:
(speed B)/(speed A) = 150/120 = 5/4
The difference in the (reduced) ratio units is 1, so 1 ratio unit corresponds to 10 mph. Multiplying the reduced ratio by 10 mph, we get ...
Speed B is 50 mph; speed A is 40 mph.
