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Q:

Ratio between speed of boat in still water to speed of stream is 7 : 2. If 126 km is travelled downstream in 3.5 hours then find the difference between speed of boat in still water to speed of stream(in kmph)?

  • 1
    15
  • 2
    22
  • 3
    24
  • 4
    20
  • 5
    18
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Answer : 4. "20"

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