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Math Help - Averaging Question

  1. #1
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    Averaging Question

    I need some help on an issue i cant realy understand:

    Example:

    I have to objects (A & B). I have the speed of both of them

    A: 1m / 1h = 1 m/h
    B: 1m /3h = 0,33 m/h

    Now if i want to find the average speed of both objects im getting different results:
    1. 2m / 4h = 0.5 m/h
    2. (1+0.33)/2 = 0.665 m/h

    could some one please explain me why i get the difference and which will be the correct answer

    Thanks in advance
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  2. #2
    A riddle wrapped in an enigma
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    Quote Originally Posted by mitko007 View Post
    I need some help on an issue i cant realy understand:

    Example:

    I have to objects (A & B). I have the speed of both of them

    A: 1m / 1h = 1 m/h
    B: 1m /3h = 0,33 m/h

    Now if i want to find the average speed of both objects im getting different results:
    1. 2m / 4h = 0.5 m/h
    2. (1+0.33)/2 = 0.665 m/h

    could some one please explain me why i get the difference and which will be the correct answer

    Thanks in advance
    I don't really understand where you got #1 from.

    The average should be \frac{1+\frac{1}{3}}{2}=.667 m/h.
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  3. #3
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    Quote Originally Posted by masters View Post
    I don't really understand where you got #1 from.

    The average should be \frac{1+\frac{1}{3}}{2}=.667 m/h.
    Its is the sum of the distance over the sum of the time...
    alltogether we have 2m for 4 hours...which gives me 0.5 m/h
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