A metallic right circular cone 20cm high and whose verticle angle is 60° is cut into parts atbthe middle of its height by a plane parallel to its base. If frustum so obtained be drawn into wire of diameter 1/16 cm, find the length of the wire.
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why is bfc 30°?
It is because we have given that vertical angle is 60° it's half is 30° as we have drawn bisector
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