- A6
- B2
- C8
- D7
Step-by-Step Solution
Downstream speed = 30/3 = 10 km/h and upstream speed = 18/3 = 6 km/h; still-water speed = (10 + 6)/2 = 8 km/h.
Answer: C) 8
A man rows 30 km downstream and 18 km upstream, taking 3 hours each way. What is his speed in still water (in km/h)?
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