Question 58
Two drivers travel from the city $A$ to the city $B$ and immediately return to the city $A$. The first driver travels with constant speed $80~\mathrm{km}/\mathrm{h}$, both on the way out and on the way back. The second driver travels to the city $B$ with constant speed $90~\mathrm{km}/\mathrm{h}$ and returns with constant speed $70~\mathrm{km}/\mathrm{h}$. Which of these drivers spends the least time on the round trip?