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A solid cone of radius 3 cm and slant height 5 cm is cut by a plane through the vertex A into two equal pieces. What is the total surface area of a piece?



 \pi rl/2 +  \pi  r^{2}/2 +d( l^{2} - d^{2}/4)/2
if its divided through the top vertex A.
d is the diametre.
then ur cone will have 3 planes....curved,triangular(side),semi circular(bottom).

answer= 23.56+14.13+48=85.69.
1 5 1
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