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On any fixed stretch, a boat's downstream trip takes 20% less time than its upstream trip. If its speed in still water is 18 km/h, what is the speed of the current?

Competition practiceBoats & Streams
  • A2 km/h
  • B3.6 km/h
  • C1.8 km/h
  • D4 km/h

Step-by-Step Solution

⇒ ⇒ ⇒ km/h.
Answer: A) 2 km/h

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