Question

diameter of the base of cone is 10.5 cm it's slant height is 10 cm .find surface area.

Answer 1

STEP 1: Find radius:

Radius = Diameter ÷ 2

Radius = 10.5 ÷ 2 = 5.25 cm

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STEP 2: Find surface area:

Surface Area of a cone = πrl + πr²

Surface Area = π (5.25) (10) + π (5.25)²

Surface Area = 251.52 cm²

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Answer: The surface area is 251.52 cm²

Answer 2

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