Question

A brick measures 15 cm in length, 8 cm in breadth and 5 cm in height. How

many bricks will be used to make a wall of length 15 m, breadth 10 m and height

8 metres?​

Answer 1

length of brick=15cm

breadth of brick=8cm

height of brick=5cm

so volume of brick=15cm*8cm*5cm

                              =600cm³

length of room=15m=1500cm

breadth of room=10m=1000cm

height of room=8m=800cm

volume of room=1500cm*1000cm*800cm

                         =1200000000cm³

hence, total no. of bricks that will be used=

                                                              (volume of room)/(volume of brick)

                                                    =1200000000cm³/600cm³

                                                    =2000000 bricks

Answer 2

Given:-

• A brick measures 15 cm in length, 8 cm in breadth and 5 cm in height.
• Length of wall is 15 m, breadth 10 m and height 8 metre.

⠀

To find:-

• Bricks will be used to make a wall.

⠀

Solution:-

→ Volume of brick = (15 × 8 × 5) cm³

→ Volume of brick = 600 cm³

⠀

Then,

→ Volume of wall = (1500 × 1000 × 800) cm³

→ Volume of wall = 1200000000 cm³

⠀

Bricks needed,

→ 1200000000/600

→ 2000000 bricks

⠀

Hence,

• the bricks will be used to make a wall is 2000000 bricks.