To calculate the distance and displacement in this scenario, we can break it down as follows:
1. **Distance**: Distance is the total length of the path taken regardless of direction.
- The initial movement is 45 km to the east.
- The second movement is 90 m to the west.
- To convert 45 km to meters (since 1 km = 1000 m), we have:
\[
45 \text{ km} = 45,000 \text{ m}
\]
- The total distance traveled is:
\[