Question

A room is $\text{5 m 40 cm}$ long and $\text{3 m 20 cm}$wide. Kareena wants to pave the floor with tiles. In the market $\text{3}$ different size tiles of the same brand quality are available:

$\text{15 cm× 24 cm at 2 rupee per tile}$

Find how many tiles of each type are needed ?

Answer 1

Step-1 : Area of the room :

Length of hall $\text{= 5 m 40 cm = 540 cm}$ and

Width of hall $\text{= 3 m 20 cm = 320 cm}$

Area of room $\text{= length × width}$

$\text{= 540 × 320}$

${\text{= 172800 cm}}^2$

Step-2: Number of tiles:

Area of tile $\text{= 15 × 24}$

${\text{= 360 cm}}^2$

Thus required number of tiles $\text{=}\frac{\text{area of room}}{\text{area of tile}}$

$\text{=}\frac{\text{172800}}{\text{360}}$

$\text{= 480 tiles}$

Hence, $\text{15 cm × 24 cm}$ at $2$ rupee each type needed is $\text{480 tiles}$.