Question

2 cars leaving Hyland at the same time, one traveling North and the other going South. The 1st car is driving 6 mph faster than the 2nd car. After 2.5 hours they are 345 miles apart. What is the speed of the 1st car ?

Answer 1

(a+a+6)*2.5=345
2a+6=138
a=132/2
a=66 mph
a+6=66+6=72 mph
Speed of the first car is 72 mph

Answer 2

What is the speed of the 1st car ?