Question 1070721
Rate*Time= Distance
.
.
1.{{{90*t=D}}}
2.{{{120*(t-1)=D}}}
So,
{{{90t=120t-120}}}
{{{-30t=-120}}}
{{{t=4}}}
So,
{{{D=90*4}}}
{{{D=360}}}{{{km}}}