A room 14 m 21 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. Choices.
A) 22636  B) 22640  C) 22647  D) 22533  E) 22675
Explanation:   Area of the room = (1421 x 777) cm2.   Size of largest square tile = H.C.F. of 1421 cm and 777 cm = 7 cm.   Area of 1 tile = (7 x 7) cm2.   Number of tiles required =(1147×777)/(7×7)=22533   Answer: Option 22533
<result>D</result>
A room 14 m 21 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.