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 ?	Choices:
A) 12 h
B) 10 h
C) 8 h
D) 6 h
E) none of these

Rationale: "area of field = 576 km 2 . then , each side of field = √ 576 = 24 km distance covered by the horse = perimeter of square field = 24 × 4 = 96 km ∴ time taken by horse = distances / peed = 96 / 12 = 8 h answer c"
Answer: C