Respuesta :

Answer:

d = 78 [km]

Explanation:

The displacement shift was from Tipton to Iowa city, so we have:

d1 = 27[km]

Then he travels back for 15[km]

d2 = 15[km]

Finally he returns back to Iowa city the displacement 36 [km]

d3 = 36[km]

d = d1 + d2 + d3

d = 27 + 15 + 36

d = 78 [km]