The area of a square field is 28808 sq m. How long will a lady take to cross the field diagonally at the rate of 7.2 km/hr?  Choose the correct choice.
A) 2.5 min	B) 3 min	C) 2 min	D) 4 min	E) 4.5 min
Area of a square field = 28808 sq m   Let the side of square = a   a^2 = 28808   =&gt; a = 169.73   Diagonal = (2)^(1/2) * a   = 1.414 * 169.73   =240   Speed of lady = 7.2 km / hour   = 7200 m / hour   = 120 m / min   Time taken by lady to cross the field diagonally = 240/120= 
<gadget id="calculator">240/120</gadget>
<output>2</output>
2 min   Answer 2 min
<result>C</result>
The area of a square field is 28808 sq m. How long will a lady take to cross the field diagonally at the rate of 7.2 km/hr?