Question

How many tiles each 10 cm square are needed to cover a rectangular wall 15 m by 7 m

Answer 1

Given the dimension of the squared tile = 10 cm

The dimension of the rectangular wall = 15 m by 7 m

we will find the area of the wall and the tile, then divide the area of the wall by the area of the tile.

Note: take care of the units

So, the area of the rectangular wall = 15 x 7 = 105 m^2

Convert to square cm

So, 1 m = 100 cm

So, 1 m^2 = 10,000 cm^2

So, the area of the rectangular wall = 1,050,000 cm^2

The area of the squared tile = 10 x 10 = 100 cm^2

So, the number of tiles = 1,050,000/100 = 10,500 tiles

So, the answer is option 10,500