Question

area of base of right circular cone is to 28.26 m square if its height is 4 m then .find the volume and curved surface area

Answer 1

Area of the base = 28.26 m² (Given)

Height = 4m (Given)

Find the volume:

Volume = 1/3 base area x height

Volume = 1/3 x 28.26 x 4 = 37.68 m³

Find the radius:

Base area = 28.26 m² (Given)

Area = πr²

πr² = 28.26

r² = 28.26 ÷ π

Take π = 3.14

r² = 9

r = √9

r = 3 m

Find the slanted height:

a² + b² = c²

3² + 4² = c²

c² = 25

c = √25

c = 5 m

Find the curved surface area:

Curved Surface area = πrl

Curved Surface area = π(3)(5)

Curved Surface area = 47.1 m²

Answer: The volume is  37.68 m³ and the curved surface area is 47.1 cm²

Answer 2

Hey....

Here is ur answer in this image..

Hope this will help you..