The total surface area of a cone whose radius is r/2 and slant height 2L is
Given, radius of a cone is 
and slant height is 2L.
Total surface area = 
Which is option b.
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The total surface area of a cone whose radius is r/2 and slant height 2L is
Given, radius of a cone is and slant height is 2L.
Total surface area =
Which is option b.