The longitudinal section of the runway provides the following data:
| End to end of runways (m) | Gradient (%) |
| 0 to 200 | +1 |
| 200 to 600 | - 1.5 |
| 600 to 1200 | + 0.8 |
| 1200 to 1600 | +1.2 |
| 1600 to 2000 | -0.5 |
Calculate the effective gradient of the section.
1
0.25 %
2
0.96 %
3
0.48 %
4
0.62 %