Question

A rectangular courtyard 3.78 metres long

and 5.25 metres wide is to be paved
exactly with square tiles, all of the same
size. What is the largest size of the tile
which could be used for the purpose ?
(A) 14 cm (B) 21 cm
(C) 42 cm (D) None of these

Answer 1

i believe the answer is C

Explanation:

3.78 meters = 378 cm

5.25 meters = 525 cm

378 x 525 = 198,450

198,450 / 42 = 4725

4725 which is a whole number