Question 951197


distance=rate*time

eastbound train:
 
{{{rate=125(km/h)}}} 

time {{{t}}}

{{{d=125*t}}}

westbound train:
 
{{{rate=135(km/h)}}} 
 
time {{{t}}}

{{{d=135*t}}}

since {{{d=1300}}}, we have

{{{125(km/h)*t+135(km/h)*t=1300km}}}....cancel km

{{{125(1/h)*t+135(1/h)*t=1300}}}

{{{260*t=1300h}}}

{{{t=1300h/260}}}

{{{t=5h}}}

the trains will pass each other in {{{5h}}}