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A river flows at 3 km/h and a small boat moves at 3 km/h in still water. What happens when the boat tries to go upstream?

Competition practiceBoats & Streams
  • AIt stays in the same place
  • BIt moves upstream at 3 km/h
  • CIt moves upstream at 6 km/h
  • DIt drifts downstream at 3 km/h

Step-by-Step Solution

Upstream speed = 3 − 3 = 0 km/h, so relative to the bank the boat does not move.
Answer: A) It stays in the same place

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