Question Statement :

Three friends A, B, and C are running on a circular track of length 60 m with speeds 1 m/s, 6 m/s and 3 m/s respectively. A and B are running in the same direction whereas C is running in opposite direction. After how much time(in seconds) from the beginning of the race A, B, and C are going to meet at the starting point?

Type in your answer as an integer. For example, if your answer is 17, type 17