the area of a square field is 900 km 2 . how long will it take for a horse to run around at the speed of 12 km / h ?
explanation area of field = 900 km 2 . then , each side of field = √ 900 = 30 km distance covered by the horse = perimeter of square field = 30 × 4 = 120 km ∴ time taken by horse = distances / peed = 120 / 12 = 10 h answer b
divide(multiply(const_4, sqrt(900)), 12)