Calculate the distance travelled by the vehicle.
The following table contains the data of speed and the time in which the vehicle has travelled.
| Duration (in \(hr\)) | 4 | 8 | 12 | 16 | 20 |
| Speed (in \(km\)\(/\)\(hr\)) | 6 | 17 | 20 | 31 | 42 |
What is the total distance covered by the vehicle at the time of \(8\) \(hours\) ?
Answer: \(km\)