- A2 h
- B2 h 30 min
- C3 h
- D3 h 20 min
Step-by-Step Solution
A floating log moves at the stream speed: km/. Upstream = km/. Time = 20 min.
Answer: D) 3 h 20 min
A log floating freely drifts 9 km in 3 hours. A boat whose speed in still water is 12 km/h travels 30 km upstream on the same river. How long does it take?
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