Find the total surface area of a cone of radius 2r and slant height 1/2.
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The total surface area of a cone of radius ' 2r ' and slant height l / 2
1) 2pi r (l+r ) 2) Pir (l+ r / 4) 3) Pi r (4r +l) 4 ) 2pi r
1) 2pi r (l+r ) 2) Pir (l+ r / 4) 3) Pi r (4r +l) 4 ) 2pi r
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