- A9
- B10.5
- C10
- D12
Step-by-Step Solution
Downstream speed = 30/2 = 15 km/h; upstream speed = 18/3 = 6 km/h. Still-water speed = (15 + 6)/2 = 10.5 km/h.
Answer: B) 10.5
A boat covers 30 km downstream in 2 hours and 18 km upstream in 3 hours. Find the speed of the boat in still water. (answer in km/h)
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