Source: Exemplar
The total surface area of a cone whose radius is r/2 and slant height 2l is
Options
Option A
2πr (l + r)
Option B is correct
πr (l + r/4)
Option C
πr (l + r)
Option D
2πrl
The total surface area of a cone whose radius is r/2 and slant height 2l is
2πr (l + r)
πr (l + r/4)
πr (l + r)
2πrl