- A7
- B8
- C9
- D6
Step-by-Step Solution
Downstream speed = 30/3 = 10 km/h, upstream speed = 30/5 = 6 km/h. Speed in still water = (10 + 6)/2 = 8 km/h.
Answer: B) 8
A boat covers 30 km downstream in 3 hours and the same 30 km upstream in 5 hours. Find the speed of the boat in still water (answer in km/h).
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