@Lazz paddy macaloon was a hero of mine as a school boy, he just said what you were thinking "if I'm troubled by every folding of your skirt am i guilty of every male inflicted hurt?" Thank fuck i got over myself 😁
Answer - insufficient data
D= 80 miles
What is the speed ?
Are they walking from same side or from opposite sides ?
If they start walking from opposite sides T={2D/(S1+S2)}
If they start walking from same side T= {2D/(S1-S2)}
Where S1 and S2 are speeds of first and second person respectively.