Bonjour,

a) V₁ = d/t₁  ou t₁ = d/V₁

b) t₂ = d/V₂

c) Δt = t₁ - t₂

d) Δt = d/V₁ - d/V₂ = d(1/V₁ - 1/V₂) = d(V₂ - V₁)/(V₁V₂)

donc d = Δt x V₁V₂/(V₂ - V₁)

Soit : d = 3 x 340x1500/(1500 - 340) ≈ 1319 m