Solve the problem. Round your answer to the nearest tenth, if necessary.A man rode a bicycle for 12 mi and then hiked an additional 8 mi. The total time for the trip was 5 hr. If his rate when he was riding a bicycle was 10 mph faster than his rate walking, what was each rate?
A. Bike: 14.5 mph; hike: 4.5 mph
B. Bike: 13 mph; hike: 3 mph
C. Bike: 12 mph; hike: 2 mph
D. Bike: 11.5 mph; hike: 1.5 mph
Answer: C
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A. 
?
B. 18?
C. 
?
D. 27?
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