Find the ratio of the total surface area and lateral surface area of a cube.

Find the lateral surface area and total surface area of a cuboid of length 80 cm, breadth 40 cm and height 20 cm.

Find the lateral surface area and total surface area of a cube of edge 10 cm.

Mary wants to decorate her Christmea tree. She wants to place the tree on a wooden block covered with coloured paper with picture of Sants Claus on it. She must know the exact quantity of paper to buy for this purpose. If the box has length, breadth and height as 80 cm, 40 cm and 20 cm respectively. How many square sheets of paper of side 40 cm would she require?

The length, breadth and height of a room are 5 m, 4 m and 3 m respectively. Find the cost of white washing the walls of the room and the ceiling at the rate of Rs. 7.50 m².