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home work

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A framed picture has length 50 cm and width 40 cm . The picture itself has area 1344 cm^2. How far is it from the edge of the picture to the edge of the frame if thid didtance is uniform around the picture ?

  • home work -

    if the width of the frame is w, the dimensions of the picture are 50-2w and 40-2w (subtract w on each side). So, since we know the area of the picture,

    (50-2w)(40-2w) = 1344
    w = 4

    Check:
    picture area is 32x42 = 1344

  • math -

    1325

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