Find the total surface area of a cone whose radius is 5 cm and height is 12 cm
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Step-by-step explanation:
The Total surface area of a cone includes the curved surface as well as area of its base, which is given as-
Base Area = πr^2
Curved Surface Area = πrl
Thus the total surface area is given by-
πr^2+πrl=πr(r+l)
22/7×5^2+22/7+5^2×13=22/7×5(5+13)
=22/7×5×18
=22/7×90
=282.85714 is the answer
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