The radii of ends of a frustum are 14cm and 6cm respectively and its height is 6cm find its total surface area (pie 3.14)
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total surface = pie [(r1 + r2)l + r1^2 +r2^2]
=3.14 [(14+6)×6 + 14^2 + 6^2]
=3.14 [20×6 +196+ 36]
=3.14 [120+232]
3.14× 352
= 1105.28 cm
=3.14 [(14+6)×6 + 14^2 + 6^2]
=3.14 [20×6 +196+ 36]
=3.14 [120+232]
3.14× 352
= 1105.28 cm
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