It's basically two lines that for a right angle and and the distance that they are apart is the hypotenuse.
so it's basically 55^2+60^2=c^2
Solve for C
two boats depart at the same location at the same time. The first travels west at 55mph and the second travels north at 60mph. Dra a right triangle which describes the position of the boats after one hour. Then solve the right triangle.
thanks for your kind help