What are the average speeds of the cars?

Question

Lewiston and Vernonville are 144 miles apart. A car leaves Lewiston traveling towards​ Vernonville, and another car leaves Vernonville at the same​ time, traveling towards Lewiston. The car leaving Lewiston averages 10 miles per hour more than the​ other, and they meet after 1 hour and 36 minutes. What are the average speeds of the cars?

Answer 1

Basic equation is 144 - s=(v+10) t where s=v t t=1.6 hrs. so 144-v t =(v+10) t or 144=2 v 1.6 +16 solve for v to get 144-16= 128 = 3.2 v hence v = 40 mph and v+10 = 50 mph.