Step 1: Let's review the information given to us to answer the question correctly:
Distance a cargo traveled = 300 (We don't know if these are miles, kilometres or other measure)
Time the cargo traveled = 5.5 hours
Step 2: Let's write our equation, as follows:
Average speed = Distance/Time
Step 3: Substitute the values we know in our equation:
Average speed = 300/5.5
Average speed = 54.55
The average speed is 54.55 units (rounding to the next hundredth)