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Vincen
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Alex and Hales started rowing towards one another at constant speeds and met after rowing for an hour. The initial distance between Alex and Hales was 20 kilometers and Alex rowed downstream while Hales rowed upstream during this journey. On some other day, the time taken by Alex alone, rowing at the same constant speed, to cover the distance between these two points going upstream was 75 minutes more than the time taken by him to cover the same distance going downstream. What was the time taken in hours by Hales to cover 20 kilometers going upstream? Assume the speed of the stream to be 4 kilometers per hour.
A. 1.25
B. 1.6
C. 2.5
D. 5
E. 8
Answer: D
Source: e-GMAT
A. 1.25
B. 1.6
C. 2.5
D. 5
E. 8
Answer: D
Source: e-GMAT
