A room 8 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 choice from the following:  A) 13636  B) 13440  C) 13647  D) 13431  E) 13675
Explanation:   Area of the room = (847 x 777) cm2.   Size of largest square tile = H.C.F. of 847 cm and 777 cm = 7 cm.   Area of 1 tile = (7 x 7) cm2.   Number of tiles required =(847×777)/(7×7)=13431   Answer: Option 13431
<result>D</result>
A room 8 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.