1. Find the total surface area (in m2) of a cube of side 15 m.   Hint Hint       2. 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       3. Find the total surface area (in m2 upto one decimal place) of a cuboid 8 m long, 4 m broad and 70 cm high.   Hint       4. Find the lateral surface area (in m2) of a cuboid 8 m long, 60 cm broad and 5 m high.   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 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       7. 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