Respuesta :

Answer:

12 km/h

Step-by-step explanation:

Answer:

D

Step-by-step explanation:

we don’t know if it would change any other way so i would say D, because 1.5 hours, that’s just divide 18 by 3 (6) to get the half hour. then you figure out that 12 km/h (north?) since the half brings it to 18. sorry if that’s confusing i’m bad with explaining