Question

A courtyard 20 m long and 15 m broad is to be paved with bricks of length 25 cm
and breadth 12 cm. Find the number of bricks required.
​

Answer 1

Given:-

• A courtyard is 20 m long and 15 m broad
• It is to be paved with bricks of length 25 cm and breadth 12 cm

To Find:-

The no of bricks required?

Solution:-

Courtyard

Length of the courtyard⠀= 20m = (20 × 100cm) = 2000 cm

Breadth of the courtyard = 15m = (15 × 100) = 1500 cm

Area of the courtyard⠀⠀= Length × breadth

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀= (2000 × 1500) cm²

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀= 300000 cm²

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

Bricks

Length of the bricks = 25 cm

Breadth of the bricks = 12 cm

Area of the bricks⠀⠀ = length × breadth

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀= (25 × 12) cm²

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀= 300 cm²

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀

Now,

$\sf \: No \: of \: bricks \: = \dfrac{Area \: \: of ⠀the⠀ courtyard}{ Area \: \: of ⠀the ⠀bricks}$

$\sf \: No \: of \: bricks \: = \dfrac{300000}{ 300}$

$⠀⠀⠀⠀⠀⠀⠀⠀ = \sf\dfrac{ \cancel{300000} { \: \: }^{10000} }{ \cancel{300} { \: \: }^{1} }$

$\boxed{\therefore \sf \: Total \: no \: of \: bricks \: required = 10000}$

More to Know:-

• Area of a square = side × side = (side)²
• Area of a rectangle = length × breadth = l × b
• Area of a triangle = 1/2 × b × h
• Area of a circle = πr² (phi stands for 22/7)
• Surface area of a cylinder = 2πrh
• Surface area if a sphere = 4πr²