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Math Help - [SOLVED] Conversion help!

  1. #1
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    [SOLVED] Conversion help!

    calculate the area of your watch glass in cm^2, then convert to in^2.
    Area = (pie)r^2

    So the diameter of the watch glass was 10.10cm. Therefore, the radius is 5.05cm.. how do i conver 5.05 cm to cm^2????? can i just tag on a ^2 or is their another way to do this??
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  2. #2
    Rhymes with Orange Chris L T521's Avatar
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    Quote Originally Posted by Legendsn3verdie View Post
    calculate the area of your watch glass in cm^2, then convert to in^2.
    Area = (pie)r^2

    So the diameter of the watch glass was 10.10cm. Therefore, the radius is 5.05cm.. how do i conver 5.05 cm to cm^2????? can i just tag on a ^2 or is their another way to do this??
    Since r=5.05~cm, then the area would be A=\pi\left(5.05~cm\right)^2\approx 80.12~cm^2

    Now to convert to inches, we see that \frac{1~in}{2.54~cm}\implies \frac{1~in^2}{6.4516~cm^2}

    So then A=80.12~cm^2\times\frac{1~in^2}{6.4516~cm^2}\appro  x\dots

    Does this make sense? Can you finish this off?

    --Chris
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  3. #3
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    Quote Originally Posted by Chris L T521 View Post
    Since r=5.05~cm, then the area would be A=\pi\left(5.05~cm\right)^2\approx 80.12~cm^2

    Now to convert to inches, we see that \frac{1~in}{2.54~cm}\implies \frac{1~in^2}{6.4516~cm^2}

    So then A=80.12~cm^2\times\frac{1~in^2}{6.4516~cm^2}\appro  x\dots

    Does this make sense? Can you finish this off?

    --Chris
    hm so u got 80 for a answer? thats about what i was getting wasnt sure if it was right.
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    actually answer is 12.4 right?
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  5. #5
    Rhymes with Orange Chris L T521's Avatar
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    Quote Originally Posted by Legendsn3verdie View Post
    actually answer is 12.4 right?


    Keep in mind though, that the units are in^2.

    --Chris
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  6. #6
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    Quote Originally Posted by Chris L T521 View Post


    Keep in mind though, that the units are in^2.

    --Chris
    aite thansk that deffintly helped big time for sure! ty.
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