Question

If the diameter of the base of a cone is 10 cm and its slant height is 12 cm, then its curved surface area is ______.​

Answer 1

Answer:

If the diameter of the base of a cone is 10 cm and its slant height is 12 cm, then its curved surface area is 188.571 approx.

For full solution refer to attachment

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Answer 2

Given:

• The diameter of the base of a cone = 10 cm
• The slant height = 12 cm

To Find:

• The curved surface area of the cone.

Solution:

The formula to find the curved surface area of the base is given by,

C.S.A = π×r×l → {equation 1}

Where "r" is the radius of the cone, "l" is the slant height.

We need to find the radius using the given diameter,

⇒ Radius = Diameter/2 = 10/2 = 5 cm

On substituting the values in equation 1 we get,

⇒ C.S.A = 3.14×5×12 {multiplying the terms}

⇒ C.S.A = 188.4 $cm^2$

∴ The curved surface area of the cone = 188.4 $cm^2$