the total surface area of a cube is 726 m square find the length of its edge also find the length of its diagonal
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therefore the length of the edge is 11m
length of the diagonal is 11√2m
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Total surface area=726 sq m
Surface area of cube=6l^2
Therefore:
6l^2=726
l^2=726/6
l^2=121
l=11
Length of each edge is 11m.
As all the angles of a square are 90°,therefore using hypotenuse theorem:
h^2=b^2+p^2
h^2=11^2+11^2
h^2=121+121
h^2=242
h=15.5 m (Approx)
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