- A15 km/h
- B12 km/h
- C14 km/h
- D16 km/h
Step-by-Step Solution
Downstream speed = 36/2 = 18 km/h; upstream speed = 36/3 = 12 km/h. Still-water speed = (18 + 12)/2 = 15 km/h.
Answer: A) 15 km/h
A motorboat goes 36 km downstream in 2 hours and comes back the same 36 km upstream in 3 hours. What is its speed in still water?
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