Find the lateral area of a cone with a radius of 7ft. and a slant height of 13ft. Use 3.14 for pi and round to the nearest tenth?

Solution:

Lateral area of a cone = πrL

Where r is the radius

L is the slant height

Radius of a cone = 7 ft

Slant height of a cone = 13 ft

Substituting the values we get

Lateral area of a cone = 3.14 × 7 × 13

By further calculation

= 285.74 ft²

= 285.7 ft² [rounding to the nearest tenth]

Therefore, the lateral surface area of a cone is 285.7 ft².

Find the lateral area of a cone with a radius of 7ft. and a slant height of 13ft. Use 3.14 for pi and round to the nearest tenth?

Summary:

The lateral area of a cone with a radius of 7ft. and a slant height of 13ft is 285.7 ft².