[\dfrac{1}{3}\pi r^{2}\sq...] The radius and the slant height of a cone are respectively "r" and "l". What is the volume of the c

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The radius and the slant height of a cone are respectively "r" and "l". What is the volume of the cone?

$\dfrac{1}{3}\pi r^{2}\sqrt{l^{2} - r^{2}}$

$\dfrac{1}{3}\pi r^{2}\sqrt{l^{2} + r^{2}}$

πrl

πr(l+r)

Explanation:

$l^{2}=r^{2}+h^{2}$

$h^{2}=l^{2}-r^{2}$

$h=\sqrt{l^{2}-r^{2}}$

$V=\dfrac{1}{3}\pi r^{2}\sqrt{l^{2}-r^{2}}$

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