Mathematics
Medium
Question
In a river, a man takes 3 hours in rowing 3 km upstream or 15 km downstream. What is the speed of the current?
A
2km/hr
✓ Official correct answer
B
4km/hr
C
6km/hr
D
9km/hr
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A
2km/hr
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B
4km/hr
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C
6km/hr
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D
9km/hr
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