How many 30cm x 60cm tiles make 15 sq meters?

Answer 1

1 m=100 cm

→ 1 sq m = 1 m x 1 m = 100 cm x 100 cm = 10000 sq cm

→ 15 sq m=15 X10000 sq cm = 150000 sq cm

Each tile has an area of 30 cm x 60 cm = 1800 sq cm

→ number_of_tiles = 150000 / 1800 = 83 1/3 tiles.

If you are going to buy the tiles you would have to buy 84 tiles.

But if this is a real life question as opposed to a maths problem then you would normally by about 10% extra to allow for breakages, cutting, etc, meaning you should buy at least 93 tiles, but that could depend upon the thickness of the tiles and how you are going to cut any that need to be cut.