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**Type : **Subjective

A and B are running along a circular track in the same direction. A and B started simultaneously from a common point on the track with speeds 10 m/s and 20 m/s respectively. If the length of the circular track is 200 m, after how much time (in seconds) are A and B going to meet each other at the starting point?

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