Find the best solution of ncert class 10 chapter surface areas and volumes . Give me the best solution of the exercise 13.4 question no. 5 . Sir please give me the easiest and simplest solution of this question. A metallic right circular cone 20 cm high and whose vertical angle is 60° is cut into two parts at the middle of its height by a plane parallel to its base. If the frustum so obtained is drawn into a wire of diameter 1/16 cm, find the length of the wire.