at_explanation_text_math
V = d / t
⇔ t = d / v
180km à 60km/h
t = 180 km / 60km.h⁻¹ = 3h
18 km à 1200 m/ min
t = 18 000 m / 1200 m/min = 15 min
230km à 100 km/h
t = 230 km / 100 km.h⁻¹ = 2,3 h = 2,3h * 60 = 138 min = 2h 18min
150 km à 200 km/h
t = 150 km / 200 km.h⁻¹ = 0,75 h = 45 min
