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What is the total surface area of the cone?
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What is the total surface area of the cone?

What is the total surface area of the cone?-example-1
User Eliane
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1 Answer

3 votes
we know that
surface area of the cone=pi*r²+pi*r*l
r=5 cm
l is the slant height

l²=12²+5²-----> l²=169--------> l=13 cm
surface area of the cone=pi*5²+pi*5*13----> [25*pi+65*pi]----> 90*pi cm²

the answer is
90*pi cm² or 282.6 cm²
User Gkpo
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