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Q:

Ratio of time taken by a sailor to cover some distance upstream and downstream is 4 : 1. If speed of stream is 4.5 km/hr. Then find out speed of boat? 

  • 1
    8.5 km / hr
  • 2
    9.5 km / hr
  • 3
    7.5 km / hr
  • 4
    8 km / hr
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Answer : 3. "7.5 km / hr "

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