Question

How many square bricks of side 15 cm will be required to cover a square ground of side 75 m?

Answer 1

Area of ground = l²
Area of ground = 75² = 5625cm²

Area of one brick = side²
Area of one brick = 15² = 225cm²

Number of bricks = 5625/225 =25bricks

Answer 2

The number of bricks is 250000.

Step-by-step explanation:

To find : How many square bricks of side 15 cm will be required to cover a square ground of side 75 m?

Solution :

A square ground of side 75 m.

The area of the ground is $A=s^2$

$A_G=(75)^2$

$A_G=5625\ m^2$

A square bricks of side 15 cm.

Convert into meter,

1 cm = 0.01 m

15 cm = 0.15 m

The area of the brick is $A=S^2$

$A_b=(0.15)^2$

$A_b=0.0225\ m^2$

The number of bricks is given by,

$n=\frac{A_g}{A_b}$

$n=\frac{5625}{0.0225}$

$n=250000$

Therefore, the number of bricks is 250000.

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