Arya starts cycling along the boundaries of the squares. She starts from a point A and after 90 minutes she reached to point C diagonally opposite to A. If she is travelling with 12km/hr, then find the area of square field.  Choose the correct choice from the following answers:
A) 81	B) 225	C) 325	D) 425	E) None of these
Explanation :   D = 12*3/2= 
<gadget id="calculator">12*3/2</gadget>
<output>18</output>
18 km. So side of square is 9km, so area – 81km^2   81nswer – 81
<result>A</result>
Arya starts cycling along the boundaries of the squares. She starts from a point A and after 90 minutes she reached to point C diagonally opposite to A. If she is travelling with 12km/hr, then find the area of square field.