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Ex 13.3, 1 - Diameter of the base of a cone is 10.5 cm - Ex 13.3

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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. [π΄π‘ π‘ π‘’π‘šπ‘’ πœ‹=22/7] Curved Surface Area of cone of cone = Ο€rl 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 = Ο€rl = (22/7Γ—5.25Γ—10) cm2 = (22/7Γ—525/100Γ—10) cm2 = ("22" Γ—75/100Γ—10) cm2 = 165 m2 Therefore, the curved surface area of the cone is 165 cm2.

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.