Question
A rectangular courtyard 3.78 m long and 5.25 m broad is to be paved exactly with square tiles, all of the same size. What is the largest size of such a tile? Also, find the number of tiles.

Answer

$21 cm 21 cm, 450$
[Hint. Largest size of square tile $=$ H.C.F. of $378 cm, 525 cm=21 cm$ ]

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