Question

how many bricks of length 30 cm breadth 20 cm and hight 20cm are required to build a wall of length 12cm breadth 0.5 m hight 3m​

Answer 1

Appropriate Question :

How many bricks of length 30 cm, breadth 20 cm and height 20 cm are required to build a wall of length 12 m, breadth 0.5 m and height 3 m.

Given :

• Length of the brick = 30 cm

• Breadth of the brick = 20 cm

• Height of the brick = 20 cm

• Length of the wall = 12 m

• Breadth of the wall = 0.5 m

• Height of the wall = 3 m

To find :

• Number of bricks required required to make the wall

Solution :

Using formula,

• Volume of bricks = l × b × h

where,

• l denotes the length
• b denotes the breadth
• h denotes the height

Substituting the given values :-

→ Volume of the brick = 30 × 20 × 20

→ Volume of the brick = 12000

Therefore, the volume of the brick = 12000 cm³

As we know,

• 1 cm² = 100² m²

→ Volume = 12000 cm²

→ Volume = 12000/10000

→ Volume = 1.2

Therefore, the volume of the brick = 1.2 m³

Using formula,

Volume of wall = l × b × h

Substituting the given values :-

→ Volume = 12 × 0.5 × 3

→ Volume = 18

Therefore, the volume of the wall = 0.18 m³

→ No. of bricks = Volume of wall ÷ Volume of bricks

→ No. of bricks = 18 ÷ 1.2

→ No. of bricks = 15

Therefore,

• The number of bricks required to build a wall of length 12 m, breadth 0.5 m and height 3 m is 15