Question

how many bricks of 20 CM length 10 cm breadth 4 cm height are required to make a cube whose each side is 2 metre?​

Answer 1

Given:-

→Length of the brick=20cm

→Breadth of the brick=10cm

→Height of the brick=4cm

→Side of the cube=2m

To find:-

→Number of bricks required to make the cube whose each side is 2m.

Solution:-

Firstly,let's find the volume of the brick:-

=>Volume of the brick:-

=>Length×Breadth×Height

=>(20×10×4) cm³

=>800cm³

Thus,we got volume of 1 brick as 800cm³.

Now,let's find the volume of the cube.

We can see that the side of the

cube is given in m.

So,firstly let's convert the side of the cube from m to cm.

=>1m=100cm

=>2m=2(100)

=>200cm

Thus,side of the cube is 200cm.

=>Volume of the cube:-

=>(side)³

=>(200)³

=>8000000cm³

Hence,we got volume of the cube as 8000000cm³.

Now,number of bricks required:-

=>Volume of the cube/Volume of the brick

=>8000000/800

=>10000 bricks

Thus,the required number of bricks are 10000.

Answer 2

Given:-

→Length of the brick=20cm

→Breadth of the brick=10cm

→Height of the brick=4cm

→Side of the cube=2m

To find:-

→Number of bricks required to make the cube whose each side is 2m.

Solution:-

Firstly,let's find the volume of the brick:-

=>Volume of the brick:-

=>Length×Breadth×Height

=>(20×10×4) cm³

=>800cm³

Thus,we got volume of 1 brick as 800cm³.

Now,let's find the volume of the cube.

We can see that the side of the

cube is given in m.

So,firstly let's convert the side of the cube from m to cm.

=>1m=100cm

=>2m=2(100)

=>200cm

Thus,side of the cube is 200cm.

=>Volume of the cube:-

=>(side)³

=>(200)³

=>8000000cm³

Hence,we got volume of the cube as 8000000cm³.

Now,number of bricks required:-

=>Volume of the cube/Volume of the brick

=>8000000/800

=>10000 bricks

Thus,the required number of bricks are 10000.

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