Mathematics
NULL
Medium
Question
A man swims 30 km downstream and 18 km upstream, each in 3 hours. What is his speed in still water?
A
2 kmph
B
8 kmph
✓ Official correct answer
C
16 kmph
D
4 kmph
Community credibility
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A
2 kmph
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B
8 kmph
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C
16 kmph
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D
4 kmph
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Explanation
Down = 10; up = 6. Still water = (10+6)/2 = 8 km/h.