if the base diameter of and the height of a cone are 10 cm height of a cone are 10 cm and 12 cm respectively, then find its
total surface area.
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T. S. A. of cone is πr(r+l)
r = d/2 = 10/2 = 5
h = 12
l²= r²+h²
= 5²+12²
= 25 + 144
l= √169
l = 13
= 22/7 x 5 (5+13)
= 22/7 x 5(18)
= 1980/7
= 282.85 cm²
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