Solution #71: The Baffling Bicycle
The apparent answer -- 15 miles per hour -- is wrong.
The correct answer is 13 1/3 miles per hour because speed is determined by
dividing the distance by time. Notice, incidentally, that the answer is the
same no matter how long the hill is.
Source: Fixx, James F
Categories: Algebra, Reasoning, Pitfall, Rates
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