An investigation was carried out to measure the breathing rate and depth of breathing of an athlete at rest and while cycling at a high intensity.
The results are shown in the table below.
| Activity | Mean number of breaths per minute | Mean volume of air in one breath in dm3\text{dm}^3dm3 | Mean volume of air breathed per minute in dm3\text{dm}^3dm3 |
|---|---|---|---|
| At rest | 12.0 | 0.5 | 6.0 |
| Cycling at 150 watts | 31.2 | 2.3 | ? |
Calculate the mean volume of air breathed per minute when cycling at 150 watts.
Give your answer to one decimal place.