- A2
- B1
- C5
- D4
Step-by-Step Solution
Downstream speed = 15/3 = 5 km/h; upstream = 15/5 = 3 km/h. Still water speed = (5 + 3)/2 = 4 km/h.
Answer: D) 4
A man rows 15 km downstream in 3 hours and 15 km upstream in 5 hours. What is his speed in still water?
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