Question

if the circumference of the base of a solid right circular is 236cm and its slant height is 12cm.find its curved surface area.

Answer 1

given ,
circumference = 236 cm
2.pi. r =236 cm
r = 236/2pi. cm

now,
curve surface area of right circular cone = pi.r .l = pi. {236/2pi} .12
=236 x 6 = 1416 cm^2

Answer 2

Hi friend,
Circumference of base = 236 cm
2πr = 236
2× 22/7 × r = 236
r = 236/2 × 7/22
r = 413/11 cm
CSA of cone = πrl
slant height ( l) = 12 cm
CSA = 22/7×413/11× 12
CSA = 118×12 cm sq.
CSA = 1416 cm sq.
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