- A4
- B8
- C18
- D6
Step-by-Step Solution
Current speed = (downstream − upstream)/2 = (22 − 14)/2 = 4 km/h. (18 km/h is the boat's still-water speed.)
Answer: A) 4
Downstream, a motorboat moves at 22 km/h; upstream, at 14 km/h. What is the speed of the current in km/h?
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