Mathematics
Medium
Question
A man whose speed is 4.5 kmph in still water rows to a certain upstream point and back to the starting point in a river which flows at 1.5 kmph, find his average speed for the total journey?
A
8 kmph
B
4 kmph
✓ Official correct answer
C
2 kmph
D
10 kmph
Community credibility
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A
8 kmph
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B
4 kmph
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C
2 kmph
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D
10 kmph
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