A dog starts chasing to a cat 2 hours later. It takes 2 hours to dog to catch the cat. If the speed of the dog is 30 Km/h. What is the speed of the cat?
Correct Answer: 15 km/h
Explanation:
Time = Distance advanced / Relative speed
2 = 2x / (30 - x)
⇒ x = 15 km/h
