Math, asked by ndhaya2006, 3 months ago

Find the total surface area of a cone whose radius is r/2 and slant height is 21.

Answers

Answered by sriniketmaster2009
4

Answer:

πr{r+4l}/2 sq units

Step-by-step explanation:

given

slant height = 2l

radius = r/2

total surface area of the cone = 2π*radius(radius+slant height)

=2π*r/2[r/2+2l]

=πr{r+4l}/2 sq units

Answered by SJSAJEEVAN
1

Answer:

πr(l+4 r )

hope this answer is helpful to you

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