In order to find the amount of Aluminium sheet required, we need to find the whole surface area of the pyramid:
Firstly, lets take the triangular side surfaces:
Area of one triangular side = 1/2 * base*height=1/2 * 440 * 356 =78320 unit square
Area of the base = length * width = 440 *440 =193600 unit square
Therefore: total surface area of the pyramid = 4(Area of one triangular side) + Area of the base
= 4(78320) + 193600 = 506880 unit square
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