Question

diameter of the base of cone is 10.5 cm and its slant height is 10 cm find the curved surface area

Answer 1

Diameter=10.5cm
Radius =10.5/2
Slant height = cm
Therefore curved surface area=pie rl
=22/7 into 10.5 upon 2 into 10
=165cm^2

Answer 2

Answer:

Radius of the base of cone = diameter/ 2 = (10.5/2)cm = 5.25cm

Slant height of cone, say l = 10 cm

CSA of cone is = πrl

= (22/7)×5.25×10 = 165

Therefore, the curved surface area of the cone is 165 cm2.

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