Question

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

Answer 1

heya your answer is here_______

radius = r/2
slant height = 2l
Therefore TSA = 22/7 × r/2 ( r/2 + 2l)
11/7 × r × (r+4l)/2
( 11r^2 × 44rl)14

Answer 2

Radius (r)=r/2     &  slant height=2l                             
TSA (S)=PIE R (l+r)
               =22/7×r/2(2l+r/2)
                 =11/7×r(2l+r/2)





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