Boats and streams - Quantitative Aptitude - Aptitude question and answers

Explanation / Important formulas:

  • Stream: Moving water of the river is called stream
  • Still Water: If the water is not moving then it is called still water
  • Downstream/Upstream: In water, the direction along the stream is called downstream. And, the direction against the stream is called upstream

If the speed of a boat in still water is A km/hr and the speed of the stream is B km/hr, then:

  • Speed downstream = (A + B) km/hr
  • Speed upstream = (A – B) km/hr

If the speed downstream is x km/hr and the speed upstream is y km/hr, then:

  • Speed in still water = ½(x+y) km/hr
  • Rate of stream = ½(x-y) km/hr

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Test - Boats and streams

Boats and streams - Question and Answers

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