Jay is going to school. To reach the school, Jay need to go 3km going north. Then, he will head to the east at a distance 7km, then 3km going south and 2km going east.
1. Find the distance
2. Find the displacement
Good lord.
distance= sum of all the walking, add them
displacement=sqrt(N^2+E^2)
= sqrt((3-3)^2+9^2)= 9East