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Question

Calculate the surface area of cone whose curved surface area is 100 cm2 and its radius 200 cm.

A
125700 cm
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B
125700 mm2
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C
125700 m2
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D
125700 cm2
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Solution

The correct option is D 125700 cm2
Given, radius r=200cm and curved surface area of the cone =100cm2.

We know, surface area of a cone = Curved surface area of a cone + Area of circle.
=πrs+πr2
=100+3.14×200×200
=100+125600
=125700cm2.

Therefore, option D is correct.

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