A room 11 m 47 cm long and 7m 77 cm broad is to be paved with square tiles. Find the least number of square tiles required to cover the floor.	Choose the most appropriate option:
A) 636
B) 640
C) 647
D) 651
E) 675
Explanation:   Area of the room = (1147 x 777) cm2.   Size of largest square tile = H.C.F. of 1147 cm and 777 cm = 37 cm.   Area of 1 tile = (37 x 37) cm2.   Number of tiles required =(1147×777)/(37×37)=651   Answer: Option 651
<result>D</result>
A room 11 m 47 cm long and 7m 77 cm broad is to be paved with square tiles. Find the least number of square tiles required to cover the floor.