- A7 hours
- B6 h 40 min
- C5 h 40 min
- D7 h 20 min
Step-by-Step Solution
A to C: 50 ÷ 15 = 3 h 20 min. Halt: 20 min. C to B upstream: 30 ÷ 9 = 3 h 20 min. Total = 7 hours.
Answer: A) 7 hours
Ghats A, B and C lie in that order down a river: AB = 20 km and BC = 30 km. A launch (12 km/h in still water, current 3 km/h) goes from A to C, halts 20 minutes, then comes back up to B. How long is it from leaving A to reaching B?
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