- A36 km/h
- B15 km/h
- C9 km/h
- D12 km/h
Step-by-Step Solution
Downstream speed = boat speed + stream speed = km/h. (9 km/h is the upstream speed.)
Answer: B) 15 km/h
A boat moves at 12 km/h in still water. The river flows at 3 km/h. What is the boat's speed when it moves with the current (downstream)?
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