- A3 h 20 min
- B2 h 30 min
- C2 hours
- D3 hours
Step-by-Step Solution
Kavya forgot the current. Upstream speed = 12 − 3 = 9 km/h, so time = 30 ÷ 9 = 10/3 h = 3 h 20 min.
Answer: A) 3 h 20 min
Kavya's working: "Boat 12 km/h in still water, current 3 km/h, so 30 km upstream takes 30 ÷ 12 = 2.5 hours." What is the correct time?
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