Răspuns:
6400 km=6.400.000m
Noua raza=6.400.000m+200m=6.600.000m
1zi=84.400 secunde.
Aplici regula de 3simpla
_______________________
84.400s-------------=6.400.000m
xs------------------------6.600.000m
____________________________________
84.400/x=6.400.000/6.600.000
84.400/x=64/66=32/33
84.400*33=64x
x=84.400*33/64=....
Explicație: