Find the number of square tiles to cover the floor of a room measuring 4 m * 9 m leaving 0.30 m space around the room. A side of square tile is given to be 20 cms? Choose the correct choice from the following answers.
A) 187  B) 714  C) 268  D) 208  E) 276
Area of the room =3.4 * 8.4= 
<gadget id="calculator">3.4 * 8.4</gadget>
<output>28.56</output>
28.56   Area of the tile= 0.2 *0.2= 
<gadget id="calculator">0.2 *0.2</gadget>
<output>0.04</output>
0.04   No. of tiles= 28.56/0.04= 
<gadget id="calculator">28.56/0.04</gadget>
<output>714</output>
714   Answer : 714
<result>B</result>
Find the number of square tiles to cover the floor of a room measuring 4 m * 9 m leaving 0.30 m space around the room. A side of square tile is given to be 20 cms?