- A23 km/h
- B31 km/h
- C13 km/h
- D28 km/h
Step-by-Step Solution
Upstream speed = 26 ÷ 2 = 13 km/h, so the current = 18 − 13 = 5 km/h. Downstream = 18 + 5 = 23 km/h.
Answer: A) 23 km/h
Against the current, a motorboat whose still-water speed is 18 km/h covers 26 km in 2 hours. What is its speed with the current?
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