State true or false.
(i) In a right circular cone, height, radius and slant height are always be the three sides of a right angled triangle.
(ii) If the volume of a right circular cone be `V` cubic-unit and the area of the base be `A` sq-unit, then the height of the cone is `{3V}/A` unit.
(iii) The volume of a right-circular cone remains the same if the length of the base radius is halved and the height is doubled.