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8 May, 22:58

A photo of a painting measures 13 inches by 17 inches. The scale factor is 1/3. What size is the painting?

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  1. 9 May, 00:34
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    Size of the painting: A * B

    Scale factor: 1/3

    Size of the photo: [1/3]A * [1/3]B

    [1/3]A = 13inches = > A = 13inches * 3 = 39 inches

    [1/3]B = 17 inches = > B = 17 inces * 3 = 51 inches.

    Answer: the size of the painting is 39 inches by 51 inches.
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