homestay management

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Time, Speed & Distance Questions

  • Numerical Ability - Time, Speed & Distance
Question

If a boat goes 7 km upstream in 42 minutes and the speed of the stream is 3 kmph, then the speed of the boat in still water is

  • A) 4.2 km/hr
  • B) 9 km/hr
  • C) 13 km/hr
  • D) 21 km/hr
  • E) None of these
Solution
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