Question

) How many bricks of length 50 cm, breadth 20 cm and height 10 cm are required to built a wall of

length 3m, height 2 m and breadth 4 m? ​

Answer 1

Answer:

Volume of wall in cm³ = l×b×h

= 300cm×200cm×400cm = 24000000cm³

Volume of each brick = l×b×h

= 50cm×20cm×10cm = 10000cm³

Thus no. of bricks required

= Volume of wall÷Volume of each brick

= 24000000/10000 = 2400 bricks Ans

Answer 2

Answer :

• Number of bricks = 240

Given :

Bricks:

• Length = 50cm
• Breadth = 20cm
• Height = 10cm

Walls :

• Length = 3m
• Breadth = 4m
• Height = 2m

To find :

• Bricks

Solution :

Given,

• Length of bricks = 50cm
• Breadth of bricks = 20cm
• Height of bricks = 10cm

As we know that,

• Volume of bricks = lbh

where , l is length, b is breadth and h is height

》Volume of bricks = Length × breadth × height

》50 × 20 × 10

》10,000 cm³

Hence , Volume of bricks is 10,000 cm³

Also Given that,

• Length of wall = 3m = 300m
• Breadth of wall = 4m = 400m
• Height of wall = 2m = 200m

As we know that ,

• Volume of walls = lbh

where, l is length, b is breadth and h is height

》Volume of walls = length × breadth × height

》300 × 400 × 200

》2400000 cm³

Hence , Volume of walls is 24,00,00 cm³

Now we have to find the bricks :

• Number of bricks = Volume of bricks/volume of walls

》2400000/10000

》240

Hence , Number of bricks = 240