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Q:

A man can row at a speed of $$4{1\over 2}$$km/hr in still water. If he takes 2 times as long to row a distance upstream as to row the same distance downstream, then the speed of stream (in km/hr) is : 

  • 1
    2
  • 2
    2.5
  • 3
    1
  • 4
    1.5
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Answer : 4. "1.5 "

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