Mathematics
Grade9
Easy
Question
How do you find the total surface area of a cone?
Hint:
The Total surface area of cone = base area + lateral surface area.
The correct answer is:
The Total surface area of cone = base area + lateral surface area.
The base area of cone = πr2 and lateral surface area of cone is is πrl .
where l is the slant height and r is the radius of the circular base of the cone.
The Total surface area of cone = πrl + πr2.
Therefore, The formula for the total surface area of a cone is πrl + πr2.
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