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Q:

A boat covers 24 km upstream and 36 km downstream in 6 hours, while it covers 36 km upstream and 24 km downstream in $$6{1\over 2}$$ hours. The speed of the current is: 

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

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