Question

How many bricks will be required to build a wall 8 m long ,6 m high and 22.5 cm thick if each bricks measure 25 cm by 11.25 cm by 6 cm?

Answer 1

volume of wall = 8*6*0.225=10.8m^3
volume of 1 brick = 0.25*0.1125*0.06=0.0016875 m^3
let n be the number of bricks.
volume of n bricks = 10.8m^3 = n* 0.0016875 m^3
therefore n = 10.8/0.0016875 = 6400
therefore 6400 bricks r required to build the req wall

Answer 2

Solution ●●●●
_______________

Lenght of the wall = 8 m = 800 cm

Height of the wall = 6 m = 600 cm

Breadth of the wall = 22.5 cm

$Volume \: \: \: \: of \: \: \: \: the \: \: \: \: wall \\ \\ = l \times b \times h \\ \\ = (800 \times 22.5 \times 600) {cm}^{3}$

$Volume \: \: \: \: of \: \: \: \: 1 \: \: \: \: brick \\ \\ = (25 \times 11.25 \times 6) {cm}^{3}$

$Number \: \: \: of \: \: \: bricks \: \: \: required \\ \\ = \frac{Volume \: \: of \: \: the \: \: wall}{Volume \: \: of \: \: 1 \: \: brick } \\ \\ = \frac{800 \times 22.5 \times 600 \: {cm}^{3} }{25 \times 11.25 \times 6 \: {cm}^{3} }$

$= 6400$
_______________________
I hope it will help you
⚽⚽⚽⚽⚽⚽