Find the number of square tiles to cover the floor of a room measuring 6.5 m * 9.5 m leaving 0.25 m space around the room. A side of square tile is given to be 25 cms?  Choose the correct choice from the following:
A) 422
B) 476
C) 429
D) 864
E) 413
Floor area to be covered by tiles = 6 * 9= 
<gadget id="calculator">6 * 9</gadget>
<output>54</output>
54   tiles area= 0.25 * 0.25= 
<gadget id="calculator">0.25 * 0.25</gadget>
<output>0.0625</output>
0.0625   No. of tiles= 54/0.0625= 
<gadget id="calculator">54/0.0625</gadget>
<output>864</output>
864   Answer : 864
<result>D</result>
Find the number of square tiles to cover the floor of a room measuring 6.5 m * 9.5 m leaving 0.25 m space around the room. A side of square tile is given to be 25 cms?