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Last updated at May 29, 2018 by Teachoo
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Ex 13.3, 1 Diameter of the base of a cone is 10.5 cm and its slant height is 10 cm. Find its curved surface area. [๐ด๐ ๐ ๐ข๐๐ ๐=22/7] Curved Surface Area of cone of cone = ฯrl Radius (r) of the base of cone = (10.5/2) cm = 5.25 cm Slant height (l) of cone = 10 cm Curved Surface Area of cone of cone = ฯrl = (22/7ร5.25ร10) cm2 = (22/7ร525/100ร10) cm2 = ("22" ร75/100ร10) cm2 = 165 m2 Therefore, the curved surface area of the cone is 165 cm2.
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