alleryA boat moves at 12 km/h in still water and the stream flows at 3 km/h. What is its downstream speed?
A9 km/h
B15 km/h
C18 km/h
D12 km/h
Answer & Solution
Correct answer: B. 15 km/h
Downstream the current helps, 12 + 3 = 15 km/h.
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