Question : If the slant height of a cone is 60 cm and the radius of its base is 21 cm, then find its curved surface area is? (use
Option 1: 3880 cm2
Option 2: 3820 cm2
Option 3: 3960 cm2
Option 4: 4020 cm2
Correct Answer: 3960 cm 2
Solution :
The slant height of a cone,
The radius of the base,
Curved surface area =
Or, curved surface area =
Hence, the correct answer is 3960 cm
2
.
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