Math

I bought a gift wrapping paper whose length is 1 m and breadth is 20 cm if I wants to wrap a box in the shape of a cube with an edge measuring 15 cm how much paper will be left with me.

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  1. Ap=L*W = 100cm * 20cm=2000 cm^2 = Area of the paper.

    As = 2(W*h) + 2(L*h) + 2(L*W) =
    Surface area box.
    As=2(15*15) + 2(15*15) + 2(15*15)
    = 6(15^2) = 1350 cm^2.

    Ap-As = 2000 - 1350 = 650 cm^2 Left.

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  2. Should fine the area of cube

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