Question

A brick measures $15cm$ in length, $8cm$ in breadth and $5cm$ in height. How many bricks will be used to make a wall of length $1.5m$, breadth $1m$ and height $0.8m$?

• A. $2000$
• B. $3000$
• C. $1000$
• D. $4000$

Answer 1

The correct option is A $2000$

We know that,
Volume of cuboid
$=Length\times Breadth\times Height$

Now,
Volume of each brick
$=15\times 8\times 5$
$=600c{m}^3$

Volume of the wall
$=150\times 100\times 80$
[$\because 1m=100cm$]
$=1200000c{m}^3$

Hence, total number of bricks to be used to make the wall
$=\frac{\text{Volume of wall}}{\text{Volume of one brick}}$

$=\frac{1200000}{600}$

$=2000$