Mary wants to decorate her Christmas tree. She wants to place the free on a wooden block covered with coloured paper with picture of Santa 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?

Mary wants to decorate her Christmas tree. She wants to place the tree on a wooden box covered with coloured paper with picture of Santa Claus on it (see Fig. 13.4). 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?

Find the volume of a box if its length, breadth and height are 20 cm, 10 cm and 30 cm respectively.

A box with lid is made of 2cm thick wood. Its external length, breadth and height are 25cm, 18cm and 15cm respectively. How many cubic cm of a liquid can be placed in it? Also, find the volume of the wood used in it.

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

The area of a square and a rectangle are equal. If the length and breadth of the rectangle is 40 cm and 10 cm, respectively, find the side of the square. Also find the perimeter of the square.

A box with lid is made of 2cm thick wood. Its external length, breadth and height are 25cm, 18cm and 15cm respectively. How much cubic cm of a liquid can be placed in it? Also, find the volume of the wood used in it.

Find the height of a cuboid of volume 100\ c m^3 , whose length and breadth are 5cm and 4cm respectively.

What is the length of the wooden strip required to frame a photograph of length and breadth 32 cm and 21 cm respectively?

The length and breadth of a rectangular sheet are 16.2 cm and 10.1cm, respectively. The area of the sheet in appropriate significant figures and error is

The length and breadth of a rectangular sheet are 16.2 cm and 10.1cm, respectively. The area of the sheet in appropriate significant figures and error is