Question

A wall is to be built using bricks of demensions 20cm×16cm×8 cm
How many bricks will be required if the wall is 10 m long 5m high 64cm thick

Answer 1

Step-by-step explanation:

20×16×8 ÷ 1000×500×64 = 12500 bricks

Answer 2

Answer :

Number of bricks required is 12500.

Step-by-step explanation :-

To Find,

• Number of bricks required

Solution,

Given that,

• Dimension of a brick = 20cm × 16cm × 8cm
• Dimension of the wall = 10m × 5m × 64cm

Converting all metres to centimetres,

• 10m = 1000cm
• 5m = 500cm

Now, Volume of a brick and the wall is,

As we know that,

$\dag \: \boxed{ \red{ \sf{Volume \: of \: cuboid = (l \times b \times h)}}}$

Therefore,

Volume of a brick :-

» 20cm × 16cm × 8cm

» 2560cm³

The volume of brick is 2560cm³.

Volume of wall :-

» 1000cm × 500cm × 64cm

» 32000000cm³

The volume of wall is 32000000cm³.

Now, required number of bricks, as we know that,

$\dag \: \: \boxed{ \red{ \sf{Number \: of \: bricks = \dfrac{Volume \: of \: wall}{Volume \: of \: a \: brick}}}}$

Therefore,

Number of bricks :-

» 32000000 / 2560

» 12500

The number of bricks is 12500.