Question

How many bricks each 25 cm by 15 cm by 8 cm, are required for a wall 32 m long, 3 m high and 40 cm thick?
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Answer 1

Answer:

volume of bricks = 25×15×8 cm = 3000 cm

volume of wall = 3200× 300 × 40 cm = 38400000

$\frac{3000}{38400000}$

= 12800

12,800 bricks are required

Step-by-step explanation:

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Answer 2

Given:-

• Dimension of bricks
• Dimension of wall

Further given that:-

• Brick=>
• Length = 25cm
• Breadth= 15cm
• Height = 8cm
• Wall
• Length = 32m
• Breadth = 3m
• Height = 40cm

To find:-

• How many brick will add up to make the wall.

Solution:-

We know that the x number of bricks will make the full wall. So we will find volume of both. Before that we have to make the units similar.

Wall:-

Conversion of m to cm.

$\begin{gathered} \bf 1m = 100cm \\ \bf 32m = 32 \times 100cm \\ \bf = 3200cm\end{gathered}$

$\begin{gathered} \bf 1m = 100cm \\ \bf 3m = 3 \times 100cm \\ \bf = 300cm\end{gathered}$

______________________________________

Finding volume:-

We know that volume of cuboid is

• Length×Breadth×Height
• 3200cm×300cm×40cm
• 38400000cm³

Brick:-

We will find volume of brick.

• 25cm×15cm×8cm
• 3000cm³

Now as we have volume of both(wall and brick) we will now divide the volume of wall by volume of bricks.

$\large\underline{\bf{ \frac{38400000 {cm}^{3} }{3000 {cm}^{3} } }}$

$\huge\underline{\bf{12800 \: bricks}}$

______________________________________

Therefore,12800 bricks are needed to make the wall.