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Two launches leave the same ghat together and both go downstream. Their still-water speeds are 14 km/h and 10 km/h, and the river flows at 3 km/h. How far apart are they after 3 hours?

Competition practiceBoats & Streams
  • A8 km
  • B72 km
  • C12 km
  • D18 km

Step-by-Step Solution

Both get the same +3 km/h, so the gap grows at km/h. After 3 h: 12 km. The stream speed does not matter.
Answer: C) 12 km

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