Peter and Tom shared the driving on a certain trip. If Peter and Tom both drove for the same amount of time, but Peter only drove \frac{2}{5} of the total distance, what was the ratio of Peter's average speed to Tom's average speed?
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A\frac{1}{5}
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B\frac{2}{5}
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C\frac{1}{2}
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D\frac{3}{5}
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E\frac{2}{3}