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In the first hour of a two-hour trip, a car traveled [#permalink]
17 Jun 2005, 14:21
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In the first hour of a two-hour trip, a car traveled d kilometers, and in the second hour of the trip, the car traveled one-half that distance. What is the average rate at which the car traveled during the trip, in kilometers per hour? (A) d (B) 1/3 d (C) 1/2d (D)3/4 d (E) 2/3 d THANKS