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Math Help - diameters and radius

  1. #1
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    Exclamation diameters and radius

    Poster board is sold in four different sizes. Molly purchased 5 square feet of poster board for her project. What size poster board did she buy?

    A. 65 centimeters x 100 centimeters

    B. 2 feet x 3 feet

    C. 24 inches x 30 inches

    D. 1 yard x 1 yard


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  2. #2
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    Quote Originally Posted by cookiesncreme View Post
    Poster board is sold in four different sizes. Molly purchased 5 square feet of poster board for her project. What size poster board did she buy?

    A. 65 centimeters x 100 centimeters

    B. 2 feet x 3 feet

    C. 24 inches x 30 inches

    D. 1 yard x 1 yard
    Hi,

    since 24'' = 2 ft and 30' = 2½ft and 2ft * 2½ft = 5square feet it's answer C
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  3. #3
    Super Member wingless's Avatar
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    I don't think this question is related to diameters or radius. It seems to me as unit conversion. Convert the units there, multiply and choose the one that makes 5 square feet.

    Edit: earboth was faster ;p
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