A room 4 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 correct answer.
A) 38636	B) 38640	C) 38647	D) 38591	E) 38675
Explanation:   Area of the room = (447 x 777) cm2.   Size of largest square tile = H.C.F. of 447 cm and 777 cm = 3 cm.   Area of 1 tile = (3 x 3) cm2.   Number of tiles required =(447×777)/(3×3)=38591   Answer: Option 38591
<result>D</result>
A room 4 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.