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?  Choices.
A) 1 min 15 sec	B) 1.5 min	C) 1 min	D) 2.5 min	E) 2 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   = 60 m / min   Time taken by lady to cross the field diagonally = 120/60= 
<gadget id="calculator">120/60</gadget>
<output>2</output>
2 min   Answer 2 min
<result>E</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?