2. The surface area of a cuboid 22 cm by 12 cm by 7.5 cm, is :
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1038 cm2
3. Given that 1 cubic cm of marble weight 25 gms, the weight of a marble block 28 cm in width and 5 cm thick is 112 kg. the length of the block is
32 cm
4. A river 2 m deep and 45 m wide is running at the rate of 3 km/hr. The amount of water that runs into the sea per minute, is :
4500m3
5. The maximum length of a pencil that can be kept in a rectangular box of dimension 8 cm x 6 cm x 2 cm, is :
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2 cm
6. A wooden box of dimensions 8 m x 7 m x 6 m is to carry rectangular boxes of dimensions 8 cm x 7 cm x 6 cm. The maximum number of boxes that can be carried in 1 wooden box, is : |
1000000
7. The volume of a wall. 5 times as high as it is broad and 8 times as long as it is high, is 12.8 m3. The breadth of the wall is :
40 cm
8.Bricks are worth Rs. 750 per 1000 and their length, breadth and height 25 cm, 12.5 cm and 7.5 cm respectively. The cost of bricks requited to build a wall 200 m long, 1.8 m high and 37.5 cm thick, is :
Rs. 43200
9. In a shower, 5 cm of rain falls. The volume of water that falls on 2 hectares of ground, is :
1000 m3
10.Three metal cubes of sides 5 cm, 4 cm and 3 cm are melted and recast into a new cube. The length of the edge of this cube is :
6 cm |
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