Answer:
To find the speed of the boat, you can use the formula:
Speed = [tex]\frac{Distance}{Time}[/tex]
In this case, the distance is 84 km, and the time is 2 hours.
Speed = [tex]\frac{84km}{2 hours}[/tex]
Speed = 42 km/h
Therefore, the boat was moving at a speed of 42 km/h.
