The area of a square field is 576 km2. How long will it take for a horse to run around at the speed of 12 km/h ? Options.
A) 12 h  B) 10 h  C) 8 h  D) 6 h  E) None of these
Area of field = 576 km2. Then,   each side of field = √576=24km   Distance covered by the horse   = Perimeter of square field   = 24 × 4 = 96 km   ∴ Time taken by horse = distances/peed=96/12= 
<gadget id="calculator">96/12</gadget>
<output>8</output>
8h   Answer 8 h
<result>C</result>
The area of a square field is 576 km2. How long will it take for a horse to run around at the speed of 12 km/h ?