What is the curved surface area of a cone of base diameter 30 centimetres and height 40 centimetres?

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Solution

Base-diametre of the cone = 30 cm

∴ Base-radius of the cone = = 15 cm

Height of the cone = 40 cm

We know that the slant height of the cone = .

Curved surface area of the cone = πrl

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What is the curved surface area of a cone of base diameter 30 centimetres and height 40 centimetres?

Base-diametre of the cone = 30 cm ∴ Base-radius of the cone = = 15 cm Height of the cone = 40 cm We know that the slant height of the cone = . Curved surface area of the cone = πrl

Base-diametre of the cone = 30 cm

∴ Base-radius of the cone = = 15 cm

Height of the cone = 40 cm

We know that the slant height of the cone = .

Curved surface area of the cone = πrl