The lateral surface area of a right circular cone of height 28m and base radius 21cm (in sqcm) is
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LSA OF A CONE=PI*R*L
HEIGHT=28m=2800cm
RADIUS=21cm
L^2=R^2+H^2
L^2=21^2+2800^2
L^2=441+7840000
L^2=7840441
L=2800.078
LET US ROUND IT OFF TO 2800CM
LSA=22/7*21*2800
LSA=184800cm^2
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