Answer:
75 km/min or 4,500 km/hr
Explanation:
Speed is the distanced covered per the time required.
Speed = Distance/Time
Distance = 3,375 km
Time = 45 minutes
Speed (km/min) = 75 km/min
Or we could change the units of time from minutes to hours: 45 min = (3/4) hour
Distance = 3,375 km
Time = (3/4) hr
Speed (km/hr) = 4,500 km/hr