A person rides bicycle on four different ways to reach the destination. Determine the average speed during this whole journey.
| Way | Speed (km/h) | Distance (km) |
| A | 5 | 20 |
| B | 3 | 15 |
| C | 2 | 10 |
| D | 4 | 24 |
1
4.5 \(\rm \frac{km}{hr}\)
2
3.45 \(\rm \frac{km}{hr}\)
3
5.5 \(\rm \frac{km}{hr}\)
4
2.45 \(\rm \frac{km}{hr}\)