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Discussion

In one hour, a boat goes 11 km/hr along the stream and 5 km/hr against the stream. The speed of the boat in still water (in km/hr) is:

  • A.3 km/hr
  • B.5 km/hr
  • C.8 km/hr
  • D.9 km/hr

Answer: C

Speed in still water = 1/2(11 + 5) kmph = 8 kmph.

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