The rectangular room is 15 meters long and 10 meters wide. it is necessary to cover the floor with tiles.

The rectangular room is 15 meters long and 10 meters wide. it is necessary to cover the floor with tiles. buy tiles with a side of 1 meter. 150 tiles were made on the whole floor; the floor was covered with square tiles and ¾ of all tiles were painted black, and the rest of the tiles were painted white. How many black tiles were there? how many whites?

1) Find the floor area 15 * 10 = 150 sq m.

2) Since the tiles are square with a side of 1 square meter, 150: 1 = 150 tiles were used to cover the floor.

3) Now we find out how many black tiles were,

150 * 3/4 = 150 * 3: 4 = 450: 4 = 112.5 black tiles, but since, according to the condition of the problem, the floor was covered with squares of tiles, it means that it was not cut, so we round 112.5 to one and get 112 black tiles.

4) 150 – 112 = 38 white tiles.

Answer: 112 tiles were painted black, 38 tiles were painted white.