Q. A, B and C start at the same time in the same direction to run around a circular stadium. A completes a round in 2.ri2 seconds, B in 308 seconds and C in 198 seconds, all starting at the same point. After what time will they meet again at the starting noint ?

1. 46 minutes 12 seconds
2. 26 minutes 18 seconds
3. 42 minutes 36 seconds
4. 45 minutes