please help and make sure all the answers and work is right

Algebra
Tutor: None Selected Time limit: 1 Day

Mar 4th, 2015

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

Mar 4th, 2015

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Mar 4th, 2015
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Mar 4th, 2015
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