The total surface area of cone of radius r/2 and slant height 2l
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T.S.A of cone = pi x radius x slant height + pi x square of radius (r^2)
TSA= pi x r/2 x 2l +pi x (r/2)^2
TSA= pi x rl +pi x r^2/4
TSA = 4pi x rl +pi x r^2/4
TSA= pi x r/2 x 2l +pi x (r/2)^2
TSA= pi x rl +pi x r^2/4
TSA = 4pi x rl +pi x r^2/4
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