Question 1114056
Denote highway speed as Vh and country speed as Vc. Then


{{{Vh=Vc+25}}}


{{{70=(Vh-25)t}}}


{{{120=Vh*t}}}


{{{(120/70)=(Vh)/(Vh-25)}}}


{{{120Vh-3000=70Vh}}}


{{{50Vh=3000}}}


Vh=60,Vc=35 (Answer)