Question 23
Find the curved surface area $$(in cm^2)$$ of a right circular cone of diameter 28 cm and slant height 12 cm.
Solution
Radius of cone, $$r=14$$ cm and slant height, $$l=12$$ cm
Curved surface area of cone = $$\pi rl$$
= $$\frac{22}{7}\times14\times12$$
= $$44\times12=528$$ $$cm^2$$
=> Ans - (C)
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