plzzzz eaxm are near.

first find the hcf of both numbers i.e. 1872 and 1320

it's 24

 we see that

1872=24*78

1320=24*55

so the tiles must be of size 24x24.(since they are to be square tiles)

now

the length 1872 cm can contain 78 such tiles

the breadth 1320  can contain 55 such tiles

sobasically we can lay 78 tiles along the length and 55 tiles along the breadth.

So,

 total 78*55 is the number of tiles.