Respuesta :

Answer:

Explanation:

1 km =1000 m

1km=1000000 mm then

1mm=1/1000000=1*10^-6

1 hour =3600 sec

1 sec=1/3600=2.8*10^-4 hr

now

1000.0 km/hr=1000.0*1*10^-6/2.8*10^-4=3.571 mm/s