Set up an equation that can be used to solve the problem. Solve the equation and answer the question asked.
-Two friends decide to meet in Chicago to attend a Cubs baseball game. Rob travels 240 miles in the same time that Carl travels 224 miles. Rob's trip uses more interstate highways and he can average 4 mph more than Carl.
What is Rob's average speed?
A) 56 mph
B) 58 mph
C) 60 mph
D) 62 mph

Question

Quizplus · Accepted Answer

Let Rob's speed be x mph. Then Carl's speed is (x - 4) mph. Since they travel for the same time, we have the equation: 240/x = 224/(x - 4). Solving this equation gives x = 60 mph.

Set Up an Equation That Can Be Used to Solve