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Volume and Surface Area of Solid Figures

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  1. Find the total surface area of a pyramid having a slant height of 8 cm and a base which is a square of side 4 cm (in cm2) ?
    1. 80
    2. 64
    3. 72
    4. 84
Correct Option: A

Total surface area of the pyramid
= [1/2(perimeter of the base) (Slant height) ] + Area of the base
= 1/2 (4) (4) (8) + 42 = 80 cm2


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