- A11 hours
- B10 hours
- C12 hours
- D9.6 hours
Step-by-Step Solution
A→B downstream at 24 km/h: 4 h. B→A upstream at 16 km/h: 6 h. Plus 1 h halt: 11 h. (Forgetting the halt gives 10 h.)
Answer: A) 11 hours
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