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Q.

How many bricks, each measuring 25 cm × 11.25 cm × 6 cm will be needed to build a wall? 8 m × 6 m × 22.5 cm? [[1]]

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Detailed Solution

We have to calculate the number of bricks, each dimensions 25 cm × 11.25 cm × 6 cm that Can be made to make a wall of dimensions 8 m × 6 m × 22.5 cm.
We know that the dimensions of brick are.
25 cm × 11.25 cm × 6 cm
Question Image

Question Image

Substituting L = 25 cm, b = 11.25 cm, h = 6 cm.
we know the dimensions of the wall are
8 m × 6 m × 22.5 cm
1 m = 100 cm
8 m = 800 cm, 6 m = 600 cm
800 cm × 600 cm × 22.5 cm
The volume of wall is = 800 cm × 600 cm × 22.5 cm
= 10,800,000 cm3
The number of bricks needed =

\frac{10800, 000}{1687.5}

= 6400.

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