Steve ran a 12-mile race at an average speed of 8 miles per hour. If Adam ran the same race at an average speed of 6 miles per hour, how many minutes longer did Adam take to complete the race than did Steve?
A. 12
B. 16
C. 24
D. 30
Answer:D
Steve ran a 12-mile race at an average speed of 8 miles per hour. If Adam ran the same race at an average speed of 6 miles per hour, how many minutes longer did Adam take to complete the race than did Steve?
A. 12 B. 16 C. 24 D. 30
Explanation: D Use the rate pie to calculate the time for each runner. Steve runs 12 miles at 8 miles per hour, so his pie looks like this: