SAT Math Multiple Choice Practice Question 439: Answer and Explanation
1. 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?
Correct Answer: E
E Use the formula for distance: distance = rate × time.
Steve runs 12 miles at 8 miles per hour, which means that he runs for 1 hours (or 1.5 if you're using your calculator). Adam runs the same 12 miles at 6 miles per hour, which means that he runs for 2 hours. Adam takes half an hour longer to complete the race, and half an hour is 30 minutes.