Question

the dimesions of a brick are 15cm x 20cm x 25 cm how many such bricks will be required to build a wall of 18m length 45m breadth and 6m height

Answer 1

hope you understand the answer

Answer 2

$\huge\bold{Answer:-}$

Given:-

• The dimension of each brick is 15cm × 20 cm × 25cm

• The length , breadth abd height of a wall is 18m , 45m , 6m .

To Find:-

• The number of bricks required to make the wall.

Solution:-

At first we have to find the volume of each brick ,

Volume of each brick = ( length × breadth × height ) cubic unit .

= ( 15 × 20 × 25 ) cm³

= 7500 cm³

Now,

The volume of wall = ( length × breadth × height ) cubic units.

= ( 18 × 45 × 6 ) m³

= 4860 m³

= ( 4860 × 1000000) cm³ [ as 1m = 100cm]

= 4860000000 cm³

Now

Number of bricks required = $\dfrac{Volume \:of \:wall}{volume \:of \:Each \:brick}$

= $\dfrac{4860000000 cm³}{7500 cm³}$

= 648000 bricks.

Therefore , 648000 number of bricks required to make the wall.