Question

The curved surface area of a right circular cone is 12320 cm². If the radius of its base is 56 cm, then find its height.

Answer 1

CSA (cone) = `pirl` = 12320

`22/7 xx 56 xx l` = 12320

`l = 70 cm`

`h = sqrt(70^2 - 56^2)` = 42 cm