A girl walking at the rate of 9 Km per hour crosses a square field diagonally in 12 seconds. The area of the field is:
Select the correct option:
A) 430 Sq.m	B) 425 Sq.m	C) 450 Sq.m	D) 475 Sq.m	E) 350 Sq.m
Distance covered in (9×1000)/(3600) × 12 = 30 m   Diagonal of squarre field = 30 m.   area of square field = 30(power)2/2   = 900/2= 
<gadget id="calculator">900/2</gadget>
<output>450</output>
450 Sq.m   Answer is 450 Sq.m.
<result>C</result>
A girl walking at the rate of 9 Km per hour crosses a square field diagonally in 12 seconds. The area of the field is: