Question

The number of square tiles, of side 15 cm, required for flooring a room of size 3.6 m * 4.5 m, will be

Answer 1

Area of a tile=15×15=225cm*2

Area of a room =3.6×4.5=16.2m*2=

16.2×10000=162000cm*2

No of tiles required=162000/225=720.

Answer 2

Given :-

• Side of tiles = 15 cm

• Dimensions of a room = 3.6 × 45 sq m

To find :-

• The no. of square tiles required for flooring a room.

Solution :-

ꕥ How to solve?

1. Firstly, find the area of tiles.

2. Then the area of room.

3. Divide the area of room by the area of tiles and now we're done ✍︎

Area of tiles = 15 × 15 = 225 sq cm

• Area of tiles = 225 sq cm

Area of room = 3.6 × 4.5 = 16.2 sq m

ꕥ Convert the area of room from sq m to sq cm

ꕥ Multiply the area of room by 10000.

= 162000 sq cm

$\sf{No.~of~tiles = \dfrac{Area~of~room}{Area~of~tiles}}$

$\sf{\dfrac{= 162000}{225}}$

= 720

❒ Hence, option 1 is correct