Question

How many bricks each 25cm by 15cm by 8cm , are required for a wall 32m long, 3m high and 40cm is thick?

• A. 13800
• B. 12700
• C. 12800
• D. 13700

Answer 1

The correct option is C 12800

For wall,

=> Converting into same units, we have ,

=> Length of the wall = 32m = 32 × 100 = 3200cm. => Breath of the wall = 3m = 3 × 100 = 300cm.

=> And the height = 40cm.

=> For brick,

=>Length of the brick = 25cm.

=>Breath of the brick = 15cm

=>Height of the brick = 8cm.

Now, we have to find number of required bricks.

=>Number of required bricks = $\frac{VolumeofWall}{Volumeofbrick}$

=> Number of required bricks = $\frac{3200\times 300\times 40}{25\times 15\times 8}$

=>Number of required bricks = 128 × 20 × 5.

=>Number of required bricks = 12800.
Thus, 12800 bricks are required.