SAT Math Multiple Choice Practice Question 439: Answer and Explanation

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Question: 439

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?

A. 9
B. 12
C. 16
D. 24
E. 30

Correct Answer: E

Explanation:

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.

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