Question

The diameter of the base of a cone is 10.5 cm, and its slant height is 10 cm. The curved surface area is:​

Answer 1

Answer:

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Step-by-step explanation:

let the radius of the cone , r = 10.5/2cm

and slant height , l= 10cm

C.S.A of cone = πrl

= 22/7 × 10.5×10 cm²

= 22 × 15 cm²

= 330 cm²

therefore , the c.s.a. of cone is 330cm².

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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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