Question

find the total surface area of cone a slant adge of 13 cm and radius of 5 cm and total find its total surfaces area?​

Answer 1

Answer :

• Total surface area of cone is 282.78cm²

Given :

• Slant edge is 13cm
• Radius is 5cm

To find :

• Total Surface area of cone

Solution :

• Radius of cone is 5cm
• Slant edge of cone is 13cm

We know that

• Total Surface area of cone = πr(r + l)

Where, r is radius and l is slant edge

➞ Total surface area of cone = πr(r + l)

➞ Total surface area of cone = 22/7 × 5 (5 + 13)

➞ Total surface area of cone = 15.71 (18)

➞ Total surface area of cone = 282.78 cm²

Hence,Total surface area of cone is 282.78cm²

More Explanation :

• A cone is a 3D shape
• Volume of cone = ⅓ πr²h
• Surface area of the cone = πr(r + l)
• Slant height of the cone = √ rl² + h²)
• A cone has only one face