Answer:
7.98
Step-by-step explanation:
First calculate average speed
Average Speed = Distance / Time
Average Speed = 4 km / 3 hr
Average Speed = 1.33 km per hr
Then you would plug in the average speed and distance 6km.
Average Speed = Distance / Time
1.33 km per hr = 6km / Time
1.33 km per hour × 6km = Time
7.98 hrs = Time