Practical Mathematics for Grade 12, Problem ID: 3999

Practical Mathematics K12John and Mary have square tiles with sizes 5 cm by 5 cm, 10 cm by 10 cm, and 15 cm by 15 cm.
Their kitchen floor is a rectangle with a 230 cm by 440 cm surface.

What is the minimum number of tiles required to completely cover the floor surface without cutting the tiles?


376 tiles522 tiles600 tiles612 tiles