Question

How many bricks measuring $25cm\times 10cm\times 8cm$ can be made from the earth dug out from a cubical pit measuring 2 m in length ?

Answer 1

The measure of the brick is 25m X 10m X 8m .

Hence, its length, breadth & height are 25m , 10m and 8m respectively.

We know volume = length X breadth X height

$\therefore$ Volume $=(25\times 10\times 8)c{m}^3=2000c{m}^3$

Now, the length of the cubical pit is 2 m.

We know, $1m=100cm\therefore 2m=200cm$

Again volume of a cube = (length${)}^3$

$\therefore$ volume of the cubical pit = (200${)}^{3}c{m}^3$

$\therefore$ number of bricks can be made $=\frac{8000000}{2000}=4000$