Advertisements
Advertisements
प्रश्न
The dimensions of a brick are 24 cm × 12 cm × 8 cm. How many such bricks will be required to build a wall of 20 m length, 48 cm breadth and 6 m height?
Advertisements
उत्तर
Length of a brick (l) = 24 cm
Breadth of a brick (b) = 12 cm
Depth of a brick (h) = 8 cm
Volume of a brick = lbh cu.units
Volume of one brick = 24 × 12 × 8 cm3
Length of a wall (l) = 20 m = 2000 cm
Breadth of a wall (b) = 48 cm
Height of a wall (h) = 6 m = 600 cm
Volume of a wall = l × b × h cu.units
= 2000 × 48 × 600 cm3
Number of bricks
= `"Volume of the wall"/"Volume of one brick"`
= `(2000 xx 48 xx 600)/(24 xx 12 xx 8)`
= `(2000 xx 2 xx 600)/(12 xx 8)` ...(÷ by 24)
= `(2000 xx 2 xx 50)/8` ...(÷ by 12)
= `(2000 xx 50)/4` ...(÷ by 2)
= 500 × 50 ...(÷ by 4)
= 25000 bricks
∴ Number of bricks = 25000
APPEARS IN
संबंधित प्रश्न
A godown measures 60 m × 25 m × 15 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 river 3 m deep and 40 m wide is flowing at the rate of 2 km per hour. How much water will fall into the sea in a minute?
The breadth of a room is twice its height, one half of its length and the volume of the room is 512cu. m. Find its dimensions.
A field is 200 m long and 150 m broad. There is a plot, 50 m long and 40 m broad, near thefield. The plot is dug 7 m deep and the earth taken out is spread evenly on the field. Byhow many meters is the level of the field raised? Give the answer to the second place of decimal.
Volume of a cuboid is 34.50 cubic metre. Breadth and height of the cuboid is 1.5m and 1.15m respectively. Find its length.
The volume of a container is 1440 m3. The length and breadth of the container are 15 m and 8 m respectively. Find its height
The volume of a cuboid is 660 cm3 and the area of the base is 33 cm2. Its height is
Volume of regular solids such as cube and cuboid can be found by multiplying the dimensions. Complete the given table by finding the volume of the given objects
| S.No. | Objects | l | b | h | Volume (cubic cm) |
| 1. | Note books | 6 cm | 15 cm | 1 cm | |
| 2. | Name board | 20 cm | 90 cm | 2 cm | |
| 3. | Show case cub board | 70 cm | 250 cm | 70 cm | |
| 4. | Gift box | 10 cm | 10 cm | 10 cm | |
| 5. | Dice | 1 cm | 1 cm | 1 cm |
The length of the longest pole that can be put in a room of dimensions (10 m × 10 m × 5 m) is ______.
