Question

an object moves 3 kilometre to west and then 4 km to North find the distance covered by the object and displacement

Answer 1

Distance = 3+4=7km
Displacement =√(3)^2+(4)^2 = 5 km

Answer 2

a) total distance travelled = 3 km + 4km = 7 km
b)  (minimum distance means displacement ) which will be the hypotenuse of the triangle formed 
5 km 
c)direction =north -east