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Answer :

`2 (1)/(3) cm` **Review from previous class**

**Cuboid**

**Cube**

**Right Circular Cylinder**

**Right Circular hollow cylinder**

**Right Circular Cone**

**Sphere and Hemisphere**

**Spherical Shell**

**Conversion of cube into cuboid by Joining : Two cubes each of 10 cm edge are joined end to end. Find the surface area and volume of cuboid.**

**Conversion of cubes by Melting and Recasting : Three cubes are melted, whose edges are `3 cm, 4 cm and 5 cm` to form a single cube. Find its edge; volume and surface area.**