If the height and radius of a right circular cone are 'h' and 'r', respectively, then the slant height is equal to $\sqrt{h^{2} + r^{2}}$ .

False

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True

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Solution

The correct option is B True

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The radii of the bases of two solid right circular cones of same height are $r_{1}$ and $r_{2}$ respectively. The cones are melted and recast into a solid sphere of radius R. Find the height of each cone in terms of $r_{1}, r_{2}$ and R.

Q. For a cone of radius 'r', height 'h' and slant height 'l',

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

Q. Assertion :If the height of a cone is

24

cm and diameter of the base is

14

cm, then the slant height of the cone is

15

cm. Reason: If

r

be the radius and

h

be the height of the cone, then slant height

= \sqrt{h^{2} + r^{2}}

Q. What is the volume of a right circular cone of base radius r, height h and slant height l?

Q. The slant height (l) of a cone of radius r and height h is

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If the height and radius of a right circular cone are 'h' and 'r', respectively, then the slant height is equal to √h2+r2.

The correct option is B True

If the height and radius of a right circular cone are 'h' and 'r', respectively, then the slant height is equal to $\sqrt{h^{2} + r^{2}}$ .