How much time (in minutes) will a dog take to run around a square field of side 75 m if it runs at the rate of 5 km/hr?

2.5 3.6 3 1.8

3

Total distance = 75 × 4 = 300 m 6 km/h = 6 × \(\frac{5 }{18}\) = \(\frac{25 }{18}\) m/sec Time = \(\frac{300×3 }{5}\) = 180 sec = 3 minutes