In a marathon race Chad is out in front, running due north at a speed of 3.98 m/s. John is 95 m behind him, running due north at a speed of 4.52 m/s. How long does it take for John to pass Chad?

Answer 1

Since John is 0.54 m/s faster than Chad (4.52-3.98), use d=vt to solve:
In this case, it is t=d/v
t=95/0.54
t=175.926 s