Question

Two automobiles going in opposite dirrections leave at the same time. One automobile travels 20 mph faster than the other. In 4 hours the automobiles are 600 miles apart. Find the speed of each. (Show work)

Answer 1

Let: Speed (Slower Vehicle) = x Let: Speed (Faster Vehicle) = (x + 20) Distance = Speed multiply Time. Therefore if rearranged: Speed = Distance/Time. Slower Vehicle: x =600/4 = 150 mph. Therefore x = 150. Faster Vehicle: (x + 20) = 600/4 = 150 + 20 = 170mph. Therefore the slower vehicle (vehicle 1) is going 150mph and the faster vehicle (vehicle 2) is going 170mph. Pretty sure thats wrong but gave it a good go.

600 (mph) = Speed/4 (Sub In)