Find the slope of the line through each pair of points (19,9),(15,-3)

Given:

Radius of the base of the cone = 12 in.

The slant height of the cone = 15 in.

To find:

The lateral surface area of the given cone.

Solution:

The lateral surface area of the cone is:

Where, r is the radius of the base of the cone and h is the slant height of the cone.

Putting , we get

The lateral surface area of the cone is 180π in ² and the missing value for the blank is 180.