The curved surface area of a right circular cone of height 15 cm and base radius 8 cm
is ……… . (a) 60 cm2 (b) 68 cm2 (c) 120 cm2 (d) 136 cm2
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Answer:
ANSWER
427.42cm²
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Given
h = 15cm
r = 8
Solution
CSA of a cone = πrL
But we dont have the value for l
Now,
l²=√h²+r²
=√15²+8²
=√225+64
=√289
=17
so,
22/7×8×17
= 427.42 cm²
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