1 . A boat sailing against a stream of river takes 6 hours to travel 24 kms, while sailing with the stream it takes 4 hours to travel the same distance. What is the speed of the stream?

  • A. 1/2 km/hr
  • B. 1 km/hr
  • C. 2 km/hr
  • D. 1.5 km/hr
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