The area of a square field is 1225 km2. How long will it take for a horse to run around at the speed of 20 km/h ?
Pick:
A) 7 h	B) 10 h	C) 8 h	D) 6 h	E) None of these
Explanation Area of field = 1225 km2. Then, each side of field = √1225=35km Distance covered by the horse = Perimeter of square field = 35× 4 = 140 km ∴ Time taken by horse = distances/peed=140/20= 
<gadget id="calculator">140/20</gadget>
<output>7</output>
7h 7 hnswer 7 h
<result>A</result>
The area of a square field is 1225 km2. How long will it take for a horse to run around at the speed of 20 km/h ?