Answer:
60 km
Explanation:
In order to find the distance that Anna has travelled, we can derive the formula from the speed formula which is:

where v is speed, s is distance and t is time. So by solving for distance (s), we have:

Apply the distance travelled formula, we know that speed (v) = 40 km/h and time (t) = 1.5 hours. Thus,

Therefore, Anna travels 60 kilometers.