the keight of a cone is 10cm and is base radius is 12cm find the curved surface area and total surface area of a cone
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Answer:
given:
height of cone=10cm
radius of cone=12cm
find:
C. S. A of cone=?
T. S. A of cone=?
l²=h²+r²
l²=(10) ²+(12) ²
l²=100+144
l=√244
l=2√61cm
C. S. A. of cone= πrl
=22/7×12×2√61
=528√61/7cm²
T. S. A of cone=πr(l+r)
=22/7×12(2√61+12)
=264/7(2√61+12) cm²
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