Question

How many bricks of length 12.5 cm, breadth 7.5 and height 5 cm are required to build a wall of the length 12.5 m, height 15 m and breadth 50 cm?​

Answer 1

Answer:

Number of bricks required to build the wall is 200000

Step-by-step explanation:

Dimension of the bricks

length l= 12.5 cm, breadth b= 7.5 cm and height h =5 cm$v = lbh \\v = 0.125 \times 0.075 \times 0.05 \\v = 4.6875 \times 10^{-4} m^3$

Dimension of the Wall

L= 12. 5 m , B = 5cm = 0.5 m, H =15 m

Volume of the wall is

$V= LBH\\V= 12.5 \times 0.5 \times 15\\V= 93.75 m^3$

Number of bricks required to build the wall is

$\frac{Volume of Wall}{Volume of brick} = \frac{V}{v}\\=\frac{93.75}{4.6875 \times 10^{-4}} \\=200000 bricks\\= 2 \times 10^5 bricks$