Look at the given data in the table and answer the question:
|
Duration
(in \(hr\))
|
0-3 | 4-6 | 7-9 | 10-12 | 13-15 |
|
Distance covered
(in \(km\))
|
1 | 16 | 25 | 34 | 49 |
What is the average speed of the journey for the first \(12\) \(hours\)?
\(km\)/\(hr\)
[Note: Enter your answer with 2 decimal digits.]