what is the surface area of a cone in terms of pi with a diameter of 14cm and a slant height of 20cm
Mathematics · High School · Mon Jan 18 2021
Answered on
Given:
Diamater = 14cm
Radius = 14cm/2
Radius = 7cm
Heigh = 20 cm
Determine the surface area.
Formula for the surface area of the cone.
A=πr(r+√(h^2+r^2))
Solution:
Substitute the given values or r, and h to the formula for the surface area of the cone.
A=π (7)((7)√(20^2+7^2))
A=π (7)((7)√(449)
A=π (7)((7)21.19)
A=π (7)(148.33)
A = 3,261.88 cm^2
Final answer:
A = 3,261.88 cm^2