29. Ryan runs at a speed of 40 m/minute. Rohit follows him after an interval of 5 minutes and runs at a speed of 50 m/minute. Rohit’s dog runs at a speed of 60 m/minute and starts along with Rohit. The dog reaches Ryan and then comes back to Rohit and continues to do so till Rohit reaches Ryan. What is the total distance covered by the dog in metres ?

1. 720

2. 600

3. 960

4. 1200

Correct Answer :