Answer :
The distance the ball would have traveled is 1,066.72 m.
Relative velocity
The relative velocity of two objects moving in the same or opposite direction can be used to determined the time of motion when the two objects move to a certain distance.
The time of motion of the two friends
[tex](V_a + V_b) t = d\\\\(3 + 3 ) t =400\\\\t = \frac{400}{6} \\\\t = 66.67 \ s[/tex]
The distance traveled by the ball
[tex]d = Vt\\\\d = 16\ m/s \ \ \times \ \ 66.67 \ s\\\\d = 1,066.72 \ m[/tex]
Thus, the distance the ball would have traveled is 1,066.72 m.
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