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Q:

If a sailer sails 12 km distance within 5 hours against the flow of a river. If he sails 22 km distance in same time along the flow of the river. Then velocity of the river is _______

  • 1
    1 km / hour
  • 2
    2 km / hour
  • 3
    1.5 km / hour
  • 4
    2.5 km / hour
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Answer : 1. "1 km / hour "

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