Question

How many bricks of length 25 cm, breadth 15 cm and height 10 cm are required to build a wall of length 6 m, height 2.5 m and breadth 0.5 m?

Answer 1

For brick,

Length(l) = 25 cm

Breadth(b) = 15 cm

Height (h) = 10 cm

For wall,

Length(l₁) = 6 m = 600 cm

Breadth(b₁) = 0.5 m = 50 cm

Height (h₁) = 2.5 m = 250 cm

Number of bricks required to build the wall = `"Volume of the wall"/"Volume of the bricks"`

= `(l_1 xx b_1 xx h_1)/(l xx b xx h)`

= `(600 xx 50 xx 250)/(25 xx 15 xx 10)`

= `(600 xx 250)/(25 xx 3)`

= 200 × 10

 = 2000

The number of brick required to build the wall is 2000 bricks.