Question

sin 1080 in trigonometry ratio​

Answer 1

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.