- A15 km/h
- B3 km/h
- C30 km/h
- D6 km/h
Step-by-Step Solution
Speed in still water = km/h. (3 km/h is the stream speed.)
Answer: A) 15 km/h
Downstream, a motorboat makes 18 km/h; upstream it makes only 12 km/h. Find its speed in still water.
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