Question

A brick measures 30cm ×10cm ×7 1/2 cm .how many bricks will be required for a wall 30cm long 2m high and 3/4m thick?

Answer 1

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

Step-by-step explanation:

Answer 2

Given - Dimensions of brick - 30cm ×10cm ×7 1/2 cm

Dimensions of wall - 30cm long 2m high and 3/4m thick

Find - Number of bricks

Solution - The volume of both brick and wall will be calculated by the formula Length*breadth*height.

Volume of one brick = 30*10*15/2

Volume of one brick = 30*10*7.5

Volume of one brick = 2250 cm³

Now calculating volume of wall. Firstly converting height and thickness into centimetres.

Height = 2 metres

Height = 200 centimetres.

Thickness = 3/4 metres

Thickness = 75 centimetres

Volume of wall = 30*75*200

Volume of wall = 4,50,000 cm³

Number of bricks required = 450000/2250

Number of bricks required = 200

Thus, 200 bricks will be required for given wall.