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Math Help - Centimetres into Seconds

  1. #1
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    Centimetres into Seconds

    Hi guys,

    I've got an equation that has been puzzling me. It's this :

    If 5 seconds equals 11.5 cm then how can i find how many seconds is 3.3 cm or 2.5 cm ?

    Thanks for your help
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  2. #2
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    First of all, a unit of length can NEVER equal a unit of time.

    If however, you are saying that this is a RATIO of time vs length, then set up the ratio as

    5 sec : 11.5 cm

    5/11.5 sec : 1 cm

    10/23 sec : 1 cm


    Can you go from here?
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  3. #3
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    I'm a musician and not a mathematician so I'm still a bit puzzled by this. I understand the first two but not the 10/23 sec : 1 cm .
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  4. #4
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    10/23 = 5/11.5. The first fraction is obtained from the second one by multiplying both the nominator and the denominator by 2.
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