Question

The radius and slant height of Cone is 2 cm and 6cm respectively its curved surface

area is ……​

Answer 1

Solution :

For the given cone ;

• Radii of the cone is 2 cm .

• Slant height of the cone is 6 cm .

The curved surface area of a cone is π r l

=> π × 2 × 6

=> 12 π cm²

=> 36.8 cm²

Answer : The curved surface area of the cone is 36.8 cm²

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Additional Information :

Volume of a cone - ⅓ π r² h

Total surface area of a cone : π r l + π r²

Volume of a cylinder : π r²h

Lateral surface area of a cylinder - π r²h

Total surface area of a cylinder : 2 π r( h + r)

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Answer 2

Given,

Radius = 2cm

Slant height = 6cm

CSA of Cone = πrl

= $\frac{22}{7} \times 2 \times 6$

= $\frac{44 \times 6}{7}$

= $\frac{264}{7}$

= 37.71 cm²