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

Verified answer

Réponse:

1) 3h

2) 15 mins

3) 2h18

4) 45 min