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Question

The height and radius of cone are 4 cm and 3 cm respectively. Find the curved surface area of cone.


A

14π cm2

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B

16π cm2

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C

15π cm2

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D

12π cm2

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Solution

The correct option is C

15π cm2


Slant height is given by
l=h2+r2
l=42+32
l=25
l=5 cm

Hence, curved surface area of cone will be
=πrl
=π ×3 × 5
=15π cm2


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