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Home->Aptitude->Boats and Streams -> Important Formulas

Boats and Streams :-

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IMPORTANT EXAMPLES
::Important Formulas
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Here Some Basic Formulas/Rules Are given below :-

  1. 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 y km /hr, then, :
    Speed downstream = (u + y) km/ hr
    Speed upstream = (u - y) km/hr.

  3. If the speed downstream is a km/hr and the speed upstream is b km /hr, then :
    Speed in still water = 1/2 (a + b) km/hr
    Rate of stream = 1/2 (a - b) km/hr

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