in 2,83 ore......170 km
in 7,33 ore......x km
x = (7,33 x 170) / 2,83
x = 440,31 ~ 400km.
___________________________
in (283 - 28) / 90 ore....170km
in (73-7) / 9 ore.... x km
in 225/90 ore...170km
in 66/9 ore....x km
x = (22/3 x 170) / 45/18
x= (3740/3) / 45/18
x = 3740/3 * 18/45
x = 67320/135