7.
1. Diameter of the base of a cone is 10.5 cm and its slant height is 10 cm. Find its curved
surface area,
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Answer:
165cm² is the answer....
Explanation:
Given: Diameter= 10.5 cm
Radius (r) = 10.5/2 cm = 5.25 cm
Slant height (l) = 10 cm
Curved surface area of the cone = (πrl)
=(22/7 × 5.25 × 10)
=165 cm²
Hence, the curved surface area of a cone =165cm²
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