Level
pending

the scheme above represents the initial instant (t = 0s) of the chase among three vehicles A, B and C, that moving with speed of 50 m/s, 20 m/s and 60 m/s, respectively. Determine how long time, in seconds, it takes until vehicle A is exactly between the vehicles B and C, at middle distance of them.
note: All units are in International System.

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