Answer:
The time required is 28.5 [min]
Explanation:
We can find the time using the kinematic equation, but first, we must convert the distance to travel in meters.
x = distance = 12 [km] = 12000 [m]
velocity = 7 [m/s]
T[tex]t = \frac{x}{v} \\t=\frac{12000}{7} \\t=1714 [s] = 28.5 [min][/tex]
