alleryA man rows downstream at 12 km/h and upstream at 8 km/h. His speed in still water is
A20 km/h
B8 km/h
C10 km/h
D12 km/h
Answer & Solution
Correct answer: C. 10 km/h
Speed in still water = (downstream + upstream) / 2 = (12 + 8) / 2 = 10 km/h.
Stream speed = (downstream - upstream) / 2 = 4/2 = 2 km/h.
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