A man takes 2.2 times as long to row a distance upstream as to row the same distance downstream. If he can row 55km downstream in 2 hours 30 minutes, what is the speed of the boat is still water ? (in km/h)

  • 40
  • 8
  • 16
  • 24
  • 32
  • Explanation:

    Downstream speed = 55/5 =11×2 = 22 km/hours

    Time taken in upstream = 2.2×5/2 = 5.5 hours

    Upstream speed = 55/5.5 = 10 km/hour

    ∴ The speed of boat in still water

    =10+22/2 = 32/2 = 16 km/hour

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A man takes 2.2 times as long to row a distance upstream as to row the same distance downstream. If
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