Question

Dan has a conical lamp shade with an altitude of 6 inches and a diameter

of 12 inches. How much material is needed to make the lampshade

Answer 1

226.22 in^2

Explanation:

Given data

Height l= 6in

Diameter= 12in

Radius= 12/2= 6in

The expression for the total surface area of a cone is given as

TSA= πrl+πr^2

substitute

TSA= 3.142*6*6+3.142*6^2

TSA= 113.112+113.112

TSA= 226.22 in^2

Hence the TSA is 226.22 in^2