Find total surface area of a cone whose radius is 2r and slant height is 1/2
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i think the question is wrong it should be L/2
total surface area of cone = pi r (r+l)
=pi *2r(L/2+2r)
=pi*2r{(l+4r)/2}
=pi r(L+4r)
total surface area of cone = pi r (r+l)
=pi *2r(L/2+2r)
=pi*2r{(l+4r)/2}
=pi r(L+4r)
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