Height of a cone is 30cm, its slant height is 32 cm, then the radius is- ?

Given:

Height of a cone is 30cm, its slant height is 34 cm.

To find:

The radius of the cone.

Solution:

Using the Pythagoras theorem, the relation between Height, radius and slant height is

Where, r is radius, h is height and l is the slant height.

Putting the given values, we get

Taking square root on both sides.

Radius cannot be negative. So, r=16 cm.

Therefore, the correct option is b.

ratio is 2 : 9

the answer is three

13.5 : 3