If a train travels 100 km100 \text{ km}100 km in 45 minutes45 \text{ minutes}45 minutes, what is its average speed in m/s\text{m/s}m/s?
37.04 m/s37.04 \text{ m/s}37.04 m/s
2.22 m/s2.22 \text{ m/s}2.22 m/s
133.33 m/s133.33 \text{ m/s}133.33 m/s
100 m/s100 \text{ m/s}100 m/s