Question 157591
Let {{{t}}}= time 1st plane is in the air
{{{t - 2}}}= time 2nd plane is in the air
When they meet, both planes will have 
flown the same distance, {{{d}}}
{{{d = 350t}}}
{{{d = 490*(t - 2)}}}
{{{350t = 490t - 980}}}
{{{140t = 980}}}
{{{t = 7}}}hrs
This is the time the 1st plane is in the air
The jet catches up with the 1st plane in
{{{t - 2}}}hrs
{{{7 - 2 = 5}}}hrs answer
(actually, 2 PM)