Curved surface area of a cone is and its slant height is . Find total surface area of the cone.
Step 1: To find the radius
Given that,
Curved surface area of a cone
slant height,
We know that,,
Curved surface area of the cone
Therefore,
Step 2: To find the total surface area
Total surface area of the cone
Base area of cone
Total surface area of the cone Curved surface area + base area
Hence, the total surface area of the cone is .