1.

The base edge of a square pyramid is 6cm, height 4cm, calculate slant height and total surface area.

Answer»

Length of base edge = 6 cm, height = 4 cm, slant height = \(\sqrt{(3)^2+(4)^2}\)

\(\sqrt{9+16}\) = \(\sqrt{25}\) = 5 cm

Total surface area = base area + curved 

surface area = (6)2 + 2 × 6 × 5 = 36 + 60 = 96 cm2



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