Perpendicular ht of right circular cone is h. Slant ht is l. Semivertical angle is a.?

What is the value of curved surface?

Answer by sreenivasbs55
Semivertical Angle = Cos-1(h/l)
Curved surface area = pi /2 x h x sqrt(l^2 – h^2)

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Answer by Geezah
The unencumbered area of a cone (which is the surface area but NOT including the base of the cone) is π*r*s, everywhere r is the radius and s is the slant height. You’re given r and s, so this should be simple to calculate.

Answer by mramahmedmram
pi x r x l = pi x 2.7 x 5.8 =49.197341 square inch

Answer by buoisang
Unencumbered surface area = PI*R*R + PI*R*L

PI = 3.14
R =radius
L = slant height

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This video show my 4 speaker line array Infinitely Baffled Subwoofer brief usage from back of HT for wide view and some cone movement action. The Dolby DD 5.1 demo DVD came from CES 2006.
Video Rating: 4 / 5