johnf30 johnf30
  • 25-03-2019
  • Mathematics
contestada

a square tile is 20 cm wide. How many tiles are needed to cover 2 square metres ​

Respuesta :

mathstudent55
mathstudent55 mathstudent55
  • 25-03-2019

Answer:

50 tiles

Step-by-step explanation:

The area of a square is the square of the side. The area of each tile is

a = (20 cm)^2 = 20 cm * 20 cm = 400 cm^2

Now we convert 2 square meters into square centimeters.

2 m^2 * (100 cm)/m * (100 cm)/m = 20,000 cm^2

2 m^2 = 20,000 cm^2

Now we divide the total area by the area of one tile.

(20,000 cm^2)/(400 cm^2) = 50

Answer: 50 tiles

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