Question

4. Mr Modi is building a wall which is 10 m long and 2 m high. Each
brick in the wall is 25 cm long and 8 cm wide. How many bricks
will be used to build the wall? (1 sq m = 10,000 sq cm)​

Answer 1

Given :---

• Length of wall = 10m
• Breadth of wall = 2m
• Length of brick = 25cm
• Width of brick = 8cm .

To Find :--

• How many bricks will be used to build the wall ?

Formula used :---

→ Area of wall = Length × Breadth

→ Area of one Brick = Length × Breadth

→ Number of bricks Required to build the wall = Area of room/ Area of One Brick ..

→ 1m = 100cm .

______________________________

Solution :--

Given ,

→ Length of wall = 10m = 10*100 = 1000cm

→ Breadth of wall = 2m = 2*100 = 200cm .

Putting value in above told formula now,

→ Area of wall = 1000*200 = 200000 cm²

______________________

Similarly,

→ Area of one brick = 25*8 = 200 cm²

So, Number of bricks Required to build the wall = Area of room/ Area of One Brick

→ No. of Bricks = 200000/200

→ No..of Bricks = 1000 Bricks

_______________

Hence, 1000 Bricks Are Required to Construct the wall.

Answer 2

Answer:

No.of bricks= Area of wall

area of brick

= 1000 X 200

25 X 8

= 1000