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The height of a square pyramid is 12cm, slant height 15cm , calculate total surface area and volume

Answer»

height =12 cm. slant height = 15 cm

a = \(2\sqrt{15^2-12^2}\) = 2 x 9 = 18 cm2

Total surface area = base- area + curved surface area

= (18)2 + 2 × 18 × 15 = 324 + 540 = 864 cm2

Volume = \(\frac{1}{3}\)(18)2 x 12 = 1296 cm3



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