Question

find the curved surface area of a cone whose radius is r/2 and slant height 2l.
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Answer 1

Answer:

Total surface area of cone=πr(r+l)

Given, radius =

2

r

and slant height =2l

Therefore new total surface area of cone =π

2

r

(

2

r

+2l)

=π(

4

r

2

+rl)

=πr(l+

4

r

)

Step-by-step explanation:

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