A person travels x distance with velocity v₁ and then x distance with velocity v₂ in the same direction. The average velocity of the person is v, then the relation between v, v₁ and v₂ will be :
A. v = v₁+v₂
B. v = (v₁+v₂)/2
C. 2/v = 1/v₁ + 1/v₂
D. 1/v = 1/v₁ + 1/v₂