The bottom of the pool has a rectangular shape, it was laid out with square tiles of tiles with sides of 2 decimeters

The bottom of the pool has a rectangular shape, it was laid out with square tiles of tiles with sides of 2 decimeters, in total, 31,250 tiles were required. Find the length of the pool if its width is 25 meters.

Let us express the side of the tile in m:

2 dm = 0.2 m.

1) Find the area of one small tile:

0.2 × 0.2 = 0.04 (sq. M) – the area of one tile;

2) Find the pool area:

0.04 × 31 250 = 1 250 (sq. M) – the area of the bottom of the pool.

3) Find the length of the pool:

1 250: 25 = 50 (m) – the length of the pool.

Answer: the length of the pool is 50 meters.