- A6 km/h
- B7 km/h
- C8 km/h
- D6.5 km/h
Step-by-Step Solution
Downstream speed = 20/2 = 10 km/h; upstream speed = 12/3 = 4 km/h. Boat speed = (10 + 4)/2 = 7 km/h.
Answer: B) 7 km/h
A boat covers 20 km downstream in 2 hours and 12 km upstream in 3 hours. What is the speed of the boat in still water?
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