Question

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

Answer 1

Total surface area of cone = pi r ( l +r)

22/7 × r/2 (2h+r/2)

22/7×r/2×2h×r/2

44hr^2/28

= 11hr^2/7

Hope this will help you....