Let us calculate

Let the side of each tile is ‘a’, Let number of tiles required be N.

We know area of rectangle = length × breadth

Area of courtyard = 385 × 60 = 22100 m²

Now, we have to calculate the longest size of square tile that can be used for paving the courtyard,

As, 22100 = 2 × 2 × 5 × 5 × 17 × 13

Clearly, we have to make 17 and 13 eliminate to make it perfect square, therefore we take square tiles of (2 × 5 = 10 cm) side.

And no of tiles