Question 606582
Define some variables:

x = distance traveled until capture
y = time of capture (hours after 10 am)

Robbers travel at 85 mph for y hours, police travel at 105 mph for (y-2) hours; both travel the same distance.

Distance = speed * time

x = 85 * y 
x = 105 * (y-2)   

85 * y = 105 * (y-2)

solve for y
Then you can calculate x and the time of capture.