How much time will a horse take to run around a square field of side 175 m if it runs at the speed of 15 km/hr?

180 sec 175 sec 155 sec 168 sec

168 sec

15 km/h= 15 × \(\frac{5 }{18}\) km/h =  \(\frac{25 }{6}\) km/h Perimeter of square = 4 × 175 = 700 m Time = \(\frac{6 }{25 }\) × 700 = 168 sec