Q27 The curved surface area of a right circular cone is 1056 cm2 and its slant helght Is 21 cm. Its radius is:
Ops: A.
O 16 cm
В.
O 12 cm
C.
O 18 cm
D.
O 14 cm
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Given:
✪ CSA of Right Circular Cone = 1056 cm²
✪ Slant Height = l = 21 cm
To find
➳ Radius = ?
Method:
Additional information:
- Volume of cone = ¹/₃ π r² h
- TSA of cone = π r² + π r l = π r(r + l)
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