Question

The floor of Mrs. Romero's room measuring 3meters by 4 meters is to be covered with tiles. Each tile is 20 centimeters squared. How many tiles are needed to cover the floor​

Answer 1

300

Step-by-step explanation:

First, determine how many tiles are needed along the width and the length of the room. Also, convert all measurements to centimeters

(1 m = 100 cm)

Width of room = 3 m = 300 cm

⇒ Number of tiles needed along the width = 300 ÷ 20 = 15

Length of room = 4 m = 400cm

⇒ Number of tiles needed along the length = 400 ÷ 20 = 20

Area = width x length

Therefore, to calculate the number of tiles needed to cover the floor:

15 x 20 = 300

Answer 2

300 tiles

Step-by-step explanation:

• 1 meter ⇔ 100 cm
• 3 meter ⇔ 300 cm
• 4 meter ⇔ 400 cm

area of rectangle: length * width || area of square: length²

area of entire floor: 300 * 400 = 120000 cm²

area of each tile: 20² = 400 cm²

Tiles needed:
`\boxed{(120000)/(400)}` → 300 tiles