- A6
- B5
- C8
- D7
Step-by-Step Solution
Downstream speed = 20/2 = 10, upstream speed = 12/3 = 4; still water = (10 + 4)/2 = 7 km/h.
Answer: D) 7
A boat travels 20 km downstream in 2 hours and 12 km upstream in 3 hours. What is the speed of the boat in still water, in km/h?
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