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Farhan rows at 7 km/h in still water on a river flowing at 3 km/h. He leaves his village ghat at 6 a.m., rows downstream, and must be back by 1 p.m. without stopping. How far downstream can he go?

Competition practiceBoats & Streams
  • A20 km
  • B24.5 km
  • C14 km
  • D35 km

Step-by-Step Solution

He has 7 hours. Downstream 10 km/h, upstream 4 km/h. ⇒ ⇒ km.
Answer: A) 20 km

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