Question

how many cubical block of length 10 cm will be required to construct a wall of size 20m*3m*50cm?

Answer 1

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Answer 2

$\bf{\huge{\underline{\boxed{\sf\purple{Answer:30,000\:bricks}}}}}$

$\huge\underline{\underline{Explanation:}}$

$\sf{\green{\underline{Given:}}}$

• A wall is to be construct with length = 20 m, breadth = 3 m and height = 50 cm.
• Edge of each  cubical block is 10 cm.

$\sf{\green{\underline{To\find:}}}$

• Number of blocks required to construct a wall.

$\textsf{\underline{\large{Solution:}}}$

In the above question, units are different. So, first of all, make it same.

∵ 1 m = 100 cm.

So, Edge of cubical block = 0.1 cm

height of cuboid-shaped wall = 0.5 cm

Now,

→ Volume of cubical block = ( side )³

→ Volume of cuboid-shaped wall = ( length × breadth × height )

Now,

Number of blocks required = $\dfrac{Volume\:of\:wall}{volume\:of\:each\:block}$

$=\dfrac{20\times 3\times 0.5}{0.1\times 0.1\times 0.1}$

$=\dfrac{30}{0.001}$

= 30,000

Hence,

30, 000 blocks are required.