Advertisements
Advertisements
प्रश्न
How many bricks of size 22 cm × 10 cm × 7 cm are required to construct a wall 11 m long, 3.5 m high and 40 cm thick, if the cement and sand used in the construction occupy (1/10)th part of the wall?
Advertisements
उत्तर
Volume of each brick = 22 cm × 10 cm × 7 cm
= 1540 cm3
= 0.00154 m3
Volume of wall = l × b × h
= `11m xx 3.5 m xx 40/100 m`
= 11 × 3.5 × 0.4 ...[∵ 1 m = 100 cm]
= 15.4 m3
If 1/10th part of the wall used in cement and sand, then part of wall used by cement and sand remaining = `15.4/10 m^3 = 1.54 m^3`
Remaining part = 15.4 – 1.54 = 13.86 m3
Number of bricks = `"Volume of wall to be construct"/"Volume of each brick"`
= `13.86/0.00154`
= 9000
APPEARS IN
संबंधित प्रश्न
A matchbox measures 4 cm × 2.5 cm × 1.5 cm. What will be the volume of a packet containing 12 such boxes?
The capacity of a cuboidal tank is 50000 litres of water. Find the breadth of the tank, if its length and depth are respectively 2.5 m and 10 m.
A solid cube of side 12 cm is cut into eight cubes of equal volume. What will be the side of the new cube? Also, find the ratio between their surface areas.
The areas of three adjacent faces of a cuboid are x, y and z. If the volume is V, prove that
`V^2` = `xyz`
Given that 1 cubic cm of marble weighs 0.25 kg, the weight of marble block 28 cm in width and 5 cm thick is 112 kg. Find the length of the block.
How many cubic centimeters of iron are there in an open box whose external dimensions are 36 cm, 25 cm and I 6.5 cm, the iron being 1.5 cm thick throughout? If I cubic cm of iron weighs 15g, find the weight of the empty box in kg.
A child playing with building blocks, which are of the shape of the cubes, has built a structure as shown in Fig. 18.12 If the edge of each cube is 3 cm, find the volume of the structure built by the child.
A godown measures 40m × 25 m × 10 m. Find the maximum number of wooden crates each measuring 1.5 m
× 1.25 m × 0.5 m that can be stored in the godown.
A storage tank is in the form of a cube. When it is full of water, the volume of water is 15.625 m3. If the present depth of water is 1.3 m, find the volume of water already used from the tank.
A birthday cake has two tiers as shown in the figure below. Find the volume of the cake.
 |
 |
