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math

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In an 8 inch by 12 inch rectangular photograph, the image of a building is 5 inches high. If the photograph is magnified until its perimeter is 720 inches, what is the height, in inches, of the image of the building in the larger photograph?

  • math -

    P1 = 2*8 + 2*12 = 40 In.
    P2 = 720 In.

    h = (P2/P1)*ho = (720/40) * 5 = 90 In.

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