1. The sum of the length, the breadth and the height of a cuboid is 17 cm and the length of its diagonal is 13 cm. Find the total surface area (in cm2) of the cuboid.   Hint Hint       2. Four cubes, each of side 4 cm are joined end to end. Find the total surface area (in cm2) of the resultant cuboid.   Hint       3. Find the total surface area (in m2) of a cube of side 15 m.   Hint       4. A cuboid of dimensions 120 cm × 60 cm × 30 cm is melted and recast into a cube. Find the total surface area (in cm2) of the cube.   Hint       5. Two cubes, each of volume 729 cm3 are joined end to end. Find the total surface area (in cm2) of the resultant cuboid.   Hint       6. The area of the square on the diagonal of a cube is 1452 cm2. Find the total surface area (in cm2) of the cube.   Hint       7. The length of the diagonal of a cube is 14 √3 cm. Find its total surface area (in cm2).   Hint