Question 247833
y=your time
a=a friends time
y=a+2
why a+2 because the friend is two hours later
20y=30a
rt=d

because they are going the same distance (catch up) we can set the two r*t's equal to each other.
substitute a+2 for y
20(a+2)=30a
20a+40=30a
40=10a
a=4
y=6
check
20y=30a
20(6)=30(4)
120=120
ok

noon+6=6pm
They went 120 miles up the Mississippi
FYI Hurricane Katrina destroyed things that far up the Mississippi