Question 982536
City hall and the two planes locations become vertices of a right triangle.  Hypotenuse is the distance between the two planes.


Eastbound traveled 2 hours.
{{{600*2}}} eastward


Northbound traveled 1 hour.
{{{500*1}}} northward


Distance between the two planes at 8AM,
{{{sqrt((600*2)^2+500^2)}}}


{{{sqrt(1440000+250000)}}}

{{{highlight(1300)}}}