Question

a brick is 20 cm long,, 10 cm broad and 6cM high. How many brick will be required to make a wall 16 long and 0.25 metre wide and 2 m high? ​

Answer 1

Step-by-step explanation:

Given:

a brick is 20 cm long,, 10 cm broad and 6cM high. How many brick will be required to make a wall 16 long and 0.25 metre wide and 2 m high?

To find:How many brick will be required to make that wall?

Solution:

Find Volume of a brick:

$l \times b \times h$

Volume of a brick:

$20 \times 10 \times 6 \: {cm}^{3}$

Volume of wall:

$16 \times 0.25 \times 2 \: {m}^{3} \\ \\ = 16 \times 0.25 \times 2 \times 1000000 \: {cm}^{3}$

Number of bricks required:

$\frac{volume \: of \: wall}{volume \: of \: brick} \\ \\ = \frac{16 \times 0.25 \times 2 \times 1000000}{20 \times 10 \times 6} \\ \\ = 6666.66$

So,

Approx 6667 bricks are required to make that wall.

Hope it helps you.

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Answer 2

Given :-

Length of the brick = 20 cm

Breadth of the brick = 10 cm

Hight of the brick = 6 cm

Length of the wall = 16 m

Width of the wall = 0.25 m

Hight of the wall = 2 m

To Find :-

Volume of the wall.

Volume of each brick.

Number of bricks required to make the wall.

Solution :-

We know that,

• l = Length
• b = Breadth
• h = Height
• a = Area

Given that,

Length, breadth, height of the brick is 21, 10 and 6 cm respectively.

By the formula,

$\underline{\boxed{\sf Volume=Length \times Breadth \times Height}}$

By substituting them,

Volume = $\sf 21 \times 10 \times 6$

Volume = 1200 cm³

Hence, the volume is 1200 cm³

Given that,

Length, breadth, height of the wall is 16, 0.25 and 2 m respectively.

(1 meter = 100 centimeter)

Converting to cm,

Length = 1600

Breadth = 25

Hight = 200

Volume = Length × Breadth × Height

Volume = $\sf 1600 \times 25 \times 200$

Volume = 8000000 m³

Finding number of bricks,

Number of bricks required = Volume of the wall ÷ Volume of the brick

Substituting them,

Number of bricks required = $\sf \dfrac{8000000}{1200}$

Number of bricks = 25000

Therefore, 25000 bricks are required.