Starting point say is AFrom A it goes south east to point BFrom B it goes south west to point CDistance AC is = 120  km AB = BC given If we draw the diagram, we find that angle ABC = 90 degreesSay, AB = x       BC. =x x^2+x^2=120^2 2x^2=14400x^2=7200 x=60*sqrt(2) km So, each part of the journey = 60*sqrt(2) km