Surface area and volume

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Across
  1. 2. If the diameter of a metallic sphere is 6 cm, it is melted and a wire of diameter 0·2 cm is drawn, then the length of the wire made shall be
  2. 3. If we join two hemispheres of same radius along their bases, then we get a;
  3. 4. The lateral surface area of a right circular cone of height 28 cm and base radius 21 cm (in sq.cm) is:
  4. 5. If we cut a cone in two parts by a plane parallel to the base, then the bottom part left over is the:
Down
  1. 1. A a solid metallic surface of diameter 21cm is melted and recast into a number of smaller cone, of diameter 3.5cm and height 3cm. The number of cones so formed is: