Question

a brick measures 30cm*10cm*15/2cm.how many bricks Will be required for a wall 30m long, 2 m high, 3/4 m thick?

Answer 1

Heyyyy mate..

Here is your answer...


given dimension of bricks= 30cm×10cm×15/2cm

volume of walls= 30m×2m×3/4m
convert it into cm

300×200×75= 4500,000

and volume of one brick= 30×10×15/2=2250cm

now required bricks= volume of walls/ volume of one brick=4500,000/2250=2000


your answer is 2000 bricks

hope it help you

Answer 2

Given:

Measures of a brick = 30cm× 10cm× 15/2cm

The measures of the wall are 30m long, 2m high and 3/4m thick.

To Find:

The number of bricks required for a wall.

Solution:

The formula of volume of cuboid is l× w× h, and both the brick and wall are cuboid so,

The volume of a brick = length× width× height

                                     = 0.3× 0.1× 3/4  [ converting the dimensions into m]

                                     = 0.9/40m³

∴ the volume of a brick is 0.9/40m³

The volume of a wall = length× width× height

                                   = 30 × 10× 3/4 cm³

                                   = 400m³

∴ The volume of the wall = 400m³

Now,

        Number of bricks required for a wall = $\frac{volume of the wall}{volume of a brick}$

                                                                      = $\frac{400}{\frac{0.9}{40} }$

                                                                      = 45× 40×100/9

                                                                      = 20,000

Therefore, the number of bricks required for a wall= 20,000