The area of a square field is 7201 sq m. How long will a lady take to cross the field diagonally at the rate of 2.4 km/hr? Choose one.
A) 2 min B) 3 min C) 4 min D) 5 min E) 6 min
Area of a square field = 7201 sq m   Let the side of square = a   a^2 = 7201   =&gt; a = 84.86   Diagonal = (2)^(1/2) * a   = 1.414 * 84.86   =120   Speed of lady = 2.4 km / hour   = 2400 m / hour   = 40 m / min   Time taken by lady to cross the field diagonally = 120/40= 
<gadget id="calculator">120/40</gadget>
<output>3</output>
3 min   Answer 3 min
<result>B</result>
The area of a square field is 7201 sq m. How long will a lady take to cross the field diagonally at the rate of 2.4 km/hr?