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Arithmetic Aptitude :: Boats and Streams

Boats and Streams - Important Formulas

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Boats and Streams - General Questions

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Boats and Streams - Averages

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Boats and Streams - Boats and Streams

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Boats and Streams - Data sufficiency 1

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Boats and Streams - Data sufficiency 2

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Boats and Streams - [data sufficiency 3]

  1. Downstream/Upstream:

    In water, the direction along the stream is called downstream. And, the direction against the stream is called upstream.

  2. If the speed of a boat in still water is u km/hr and the speed of the stream is v km/hr, then:

    Speed downstream = (u + v) km/hr.

    Speed upstream = (u - v) km/hr.

  3. If the speed downstream is a km/hr and the speed upstream is b km/hr, then:

     speed in still water = \( \frac { 1 } { 2 } \) ( a+b )km/hr 

  4.   Rate of Stream =  \( \frac { 1 } { 2 } \) ( a-b )km/hr 

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