Correct Answer - Option 4 : 3

**Given:**

Square of side = 75 m

And a dog runs around the square with a speed of = 6 km/hr

**Formula Used:**

The perimeter of a square = 4 × side of the given square

**Calculation:**

⇒ Speed of the dog in m/sec = 6 × 1000/3600 = 6× 5/18 **= 5/3 m/sec**

⇒ The perimeter of the Square = 4 × 75 m = **300 m**

⇒ Time = Distance/speed

Hence, Time is taken by the dog to travel around the square

⇒ Time = (300)/(5/3) = 60 × 3 seconds or (60 × 3)/60 = **3 minutes**