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Math Help - cube volumes

  1. #1
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    cube volumes

    hi its been a while since i have had any thing harder than plain old adding up to , so wonder if somebody could point me in the right direction
    if i Have an aero bar with 0.04mm square and .1mm deep with 16 bubbles in each square , how do i calculate how many bubbles in 1mm cube

    i did it my way and it made sense to me , then the kids came home and really confused me with different solutions , making me feel really thick , so if anyone knows the right way please enlighten me
    thanks in advance
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  2. #2
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    Hello, stupidandold!

    The wording is vague . . . can you clarify?


    I have an aero bar with 0.04mm square and .1mm deep
    with 16 bubbles in each square, .
    . . . each square WHAT?
    how do i calculate how many bubbles in a 1mm cube?

    We have a bar which is:  0.04 \text{ mm } \times 0.04 \text{ mm }  <br />
 \times 0.1 \text{ mm}
    . . so we are dealing with volume, not squares.


    If you mean 16 bubbles per bar, we can work out the answer.

    There are 16 bubbles in: (0.04)(0.04)(0.1) \:=\:0.00016 mm≥.

    A 1-mm cube has a volume of 1 mm≥.


    So we have: . \frac{1\text{ mm}^3}{1} \times \frac{16\text{ bubbles}}{0.00016\text{ mm}^3} \;=\;100,\!000\text{ bubbles}

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