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1 answer:
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Answer:
75 mph
Step-by-step explanation:
A biker must circle a 12-mile track twice. His average speed must be 60 mph.
So, the average time required to cover the distance is hours.
Now, on his first lap, he averaged 50 mph.
So, he covered this 12 miles track in hours.
Hence, he has to cover the next 12 miles track in (0.4 - 0.24) = 0.16 hours.
Therefore, his average speed in the second round must be mph to qualify. (Answer)