Find the T.S.A of a cone whose radius is r/2 units and slant height is 2l units. Share with your friends Share 0 Ankita Agarwal answered this Dear Student, Total surface area of cone = πrl+πr2Given: radius r =r2 and slant height l= 2lTSA = πrl+rTSA = πr22l+r2TSA = πrl+r4 Ans Regards 0 View Full Answer