1. How many bricks, each measuring 25 cm x 11.25 cm x 6 cm, will be needed to build a wall of 8 m x 6 m x 22.5 cm? (3)
- 1. 5600
- 2. 6000
- 3. 6400
- 4. 7200
2. A large cube is formed from the material obtained by melting three smaller cubes of 3, 4 and 5 cm side. What is the ratio of the total surface areas of the smaller cubes and the large cube? (3)
- 1. 2 : 1
- 2. 3 : 2
- 3. 25 : 18
- 4. 27 : 20
3. A cistern of capacity 8000 litres measures externally 3.3 m by 2.6 m by 1.1 m and its walls are 5 cm thick. The thickness of the bottom is: (2)
- 1. 90 cm
- 2. 1 dm
- 3. 1 m
- 4. 1.1 cm
4. A boat having a length 3 m and breadth 2 m is floating on a lake. The boat sinks by 1 cm when a man gets on it. The mass of the man is: (2)
- 1. 12 kg
- 2. 60 kg
- 3. 72 kg
- 4. 96 kg
5. A metallic sheet is of rectangular shape with dimensions 48 m x 36 m. From each of its corners, a square is cut off so as to make an open box. If the length of the square is 8 m, the volume of the box (in m3) is: (2)
- 1. 4830
- 2. 5120
- 3. 6420
- 4. 8960