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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

  • 12 kmph
  • 13 kmph
  • 14 kmph
  • 15 kmph
Similar Questions :

1. A motorboat, whose speed in 15 km/hr in still water goes 30 km downstream and comes back in a total of 4 hours 30 minutes. The speed of the stream (in km/hr) is

  • 2 km/hr
  • 3 km/hr
  • 4 km/hr
  • 5 km/hr

2. 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

  • 12 kmph
  • 13 kmph
  • 14 kmph
  • 15 kmph

3. A man takes 3 hours 45 minutes to row a boat 15 km downstream of a river and 2 hours 30 minutes to cover a distance of 5 km upstream. Find the speed of the current.

  • 1 km/hr
  • 2 km/hr
  • 3 km/hr
  • 4 km/hr

4. A boat can travel with a speed of 16 km/hr in still water. If the rate of stream is 5 km/hr, then find the time taken by the boat to cover distance of 84 km downstream.

  • 4 hours
  • 5 hours
  • 6 hours
  • 7 hours

5. A man can row \begin{aligned} 9\frac{1}{3} \end{aligned} kmph in still water and finds that it takes him thrice as much time to row up than as to row, down the same distance in the river. The speed of the current is.

  • \begin{aligned} 3\frac{2}{3}kmph \end{aligned}
  • \begin{aligned} 4\frac{2}{3}kmph \end{aligned}
  • \begin{aligned} 5\frac{2}{3}kmph \end{aligned}
  • \begin{aligned} 6\frac{2}{3}kmph \end{aligned}
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