A rectangular courtyard 3.78 m lang and 5.25 m broad is to be paved exactly with square tiles, all of the same size. The minimum number of such tiles is:
Explanation:
The length of courtyard = 3.78m = 378 cm
And, the broad of courtyard = 5.25m = 525cm
The courtyard is to be paved by square tiles of equal size.
∴ 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 = 525×378/21×21
=450