Answer:
Step-by-step explanation:
Given:
L = 68 km
V₁ = 88.2 km/h
V₂ = 97.4 km/h
_____________
t -?
Time to complete the distance for each skier:
t₁ = L / V₁ = 68 / 88.2 ≈ 0.77 h
t₂ = L / V₂ = 68 / 97.4 ≈ 0.70 h
Waiting time:
t = t₁ - t₂ = 0.77 - 0.70 = 0.07 h
or
t = 60·0.07 = 4.2 min