Question

How many bricks are need to build a wall of length 44 meter, height 1.5 meter andbroad $85cm$. The measurement of each brick is $20cm\times 10cm\times 17cm$.

Answer 1

Length of the wall $=44$ meter
$=44\times 100cm=4400cm$
height $=1.5$ meter $=1.5\times 100=150cm$
width of the wall $=85cm$
volume of the wall = length $\times$ breadth $\times$ height $=4400\times 85\times 150{cm}^3$
length of one brick $=22cm$
breadth $=10cm$
height $=17cm$
The volume of a brick $22\times 10\times 17{cm}^3$
Number of bricks $=\frac{\text{Volume of the wall}}{\text{Volume of one brick}}$
$=\frac{4400\times 85\times 150}{22\times 10\times 17}=15000$
Hence, 15000 bricks will be needed.