Question
A cone has a radius of 5 cm and a slant height of 13 cm.
Find the total surface area of the cone.[Take π = 3.14 ]Solution
To find the total surface area of a cone, we use the formula: Total Surface Area = πr(r+l) where: r = 5 cm (radius), l = 13 cm (slant height), π = 3.14.
Total Surface Area = 3.14×5×(5+13) = 3.14×5×18 = 3.14×90 = 282.6 cm²
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