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619

Q:

A motorboat whose speed is 20 km/h in still water takes 30 minutes more to go 24 km upstream than to cover the same distance downstream. If the speed of the boat in still water is increased by 2 km/h, then bow much time will it take to go 39 km downstream and 30 km upstream?

  • 1
    3 h 40 m
  • 2
    2 h 40 m
  • 3
    3 h 10 m
  • 4
    2 h 50 m
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  • Workspace

Answer : 3. "3 h 10 m"

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