Multiple choice

Two trains each of length $90\ m$ moving in opposite directions along parallel tracks meet when their speeds are $60\ km/hr$ and $40\ km/hr$. If their accelerations are $0.3\ m/s^{2}$ and $0.15\ m/s^{2}$ respectively, find the time they take to pass each other.

  1. $8\ s$
  2. $4\ s$
  3. $2\ s$
  4. $6.17\ s$
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A Correct answer