Question

The floor of a room of 7.2 m length and 4 m breadth is to be tiled. How many tiles will be required for this job if each square tile to be used has a side of 30 cm?​

Answer 1

Answer:

3.2 tile

Step-by-step explanation:

area of room - 7.2 × 4

= 28.8m

convert it into cm - 28.8 × 100

= 2880 cm

area of tile - 30×30

= 900 cm

total tile required - 2880/900

= 3.2 tiles

Answer 2

Given

• The length (l) of the room is 7.2 m
• The breadth (b) of the room is 4 m
• The side of the square tiles is 30 cm

To find:

• Number of tiles required to fill the floor of the room

Now, converting all given values in cm,

$\boxed{1m = 100cm}$

Room's length = 7.2 * 100 = 720 cm

Room's breadth = 4 * 100 = 400 cm

Now,

The area of the floor (room) = length * breadth (unit sq.)

   = 720 * 400

   = 288000 cm sq.

Also,

We have to find the area of the square tiles,

Area of one square tile is = (side)² unit sq.

   = (30)²

   = 900 cm sq.

• Finding the number of tiles required to fill the room,

$\bf Number\ of\ tiles = \frac{Area\ of\ the\ room}{Area\ of\ one\ tiles}$

$\bf Number\ of\ tiles = \frac{288000}{900}$

Number of tiles = 320

Hence,

The room required 320 tiles.

Some important notes,

• Always check the units. If the units are same then move forward.
• But if the units are different, then convert them and make all unit the same.