Question

Find the number of bricks of dimension 40cm×8cm×20cm required to construct a wall of dimension 200cm×100cm×10cm?

Answer 1

ANSWER

⏩ Dimension of brick are

$= 20 cm \times 10 cm \: \times 5cm$

⏩ Volume of a brick

$= 20 \times 10 \times 5$

$= 1000cm {}^{3}$

⏩ Dimension of wall

$= 10m \times 15m \times 0.2m$

⏩ Volume of wall

$= 10 \times 15 \times 0.2$

$= 30m {}^{3}$

Now, no. of brick required to make wall

$\frac{volume \: of \: wall}{volume \: of \: 1 \: brick}$

No. of bricks

$= \frac{30m {}^{3} }{1000m {}^{3} } \times 10 {}^{6}$

$= 30 \times 10 {}^{3}$

$no \: of \: bricks \: = 30000 \: bricks$

Answer ⏩ 30000 Bricks