# A rectangular courtyard 3.78 m long and 5.25 m broad is to be paved exactly with square tiles, all of the sam size. The minimum number of such tiles is :

- 350
- 550
- 450
- none of these

**Answer: (3) 450 **

**Explanation:-**

The length of courtyard = 3.78 m = 378 cm

And, the broad of courtyard = 5.25 m = 525 cm

The courtyard is to be paved by square tiles of equal size.

Therefore, Size of square tile is the HCF of length and breadth as to cover exactly.

The HCF of 525 and 378 = 21 cm

Then, the side of each square tile = 21 cm

The number of tiles = 525 x 378/21 x 21

= 450

Hence, the correct answer is option (3) 450.