Question

what is formula for cone?

Answer 1

Curved Surface Area of Cone=$\pi$rl
r =radius
l =slant lengh
Surface Area of Cone= $\pi$r(r+l)
Volume of Cone = 1/3 $\pi$$r^{2}$l

If 'l' is not given l=$\sqrt{} r^{2}+ h^{2}$
similarly r = $\sqrt{} l^{2}- h^{2}$
h=$\sqrt{} l^{2}- r^{2}$

Answer 2

The following are the formulae related to Right Circular Cone.

$Base\ circle\ radius=r\\Height=H\\slanting\ height=L\\\\Area\ of\ base=\pi r^2\\L^2=H^2+r^2\\Volume=\frac{1}{3}\pi r^2 L\\Surface\ area:\ lateral = \pi r L,\\Total\ surface\ area=\pi r (r+L)\\circumference\ of\ base=2 \pi r$

Center of mass is at 1/3 H from the base.