1.Length, breadth and height of a cuboid are l, b and h respectively. length of the diagonal of the cuboid is:

2. The dimensions of a box are 1 m, 80 cm and 50 cm. The area of its four walls is :

3. If the length of the diagonal of a cube is 6√3 cm, then edge of the cube is:

4. Two cubes each of edge 5 cm are joined face to face. The surface area of the cuboid thus formed is:

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