Question

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

Answer 1

SOLUTION :-

=> 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 = Volume of wall / Volume of brick

=> Number of required bricks = 3200 × 300 × 40 / 25 × 15 × 8 .

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

=>Number of required bricks = 12800.

Hence, the required number of bricks is 12800.

Answer 2

Given

Dimensions of brick =25cmx15cmx8cm

The volume of brick =25x15x8

=3000cm³

The dimensions of wall =32mx3mx40cm

Let change the m in cm we have

Volume of wall =3200x300x40

=38400000cm³

Bricks required =volume of wall/ volume of one brick

=38400000/3000

=12800 bricks