A school boy walk 10 meter due west and afterward 15meter due south before reaching his school. Calculate the total distance and his displacement

Distance = 10 + 15 = 25 m.

X = -10 m.
Y = -15 m.
Q3.

Tan A = Y/X = -15/-10 = 1.50.
A = 56.3o S. of W. = 236.3o CCW.

Displacement = -15/sin236.3 = 18 m[236.3o] CCW.