The table and graph show the motion of two autonomous delivery drones, Drone A and Drone B, flying along a straight-line flight path between two hubs.
| Time (s) | Distance of Drone A (m) | Distance of Drone B (m) |
|---|---|---|
| 0 | 0 | - |
| 3 | 18 | 0 |
| 6 | 36 | 24 |
| 9 | 54 | 48 |
| 12 | 72 | 72 |
| 15 | 90 | 96 |
State the distance that Drone A has travelled when Drone B overtakes it.