Problem 30 answer
Place the slower boat initially at the origin of a coordinate
plane, and equate "north" with the positive y-axis, and east with
the positive x-axis.
x = 75 * [ 1/5*(y/50)5/3 - (y/50)1/3 ] + 60
It takes 3 hours for the chasing boat to catch the other boat.
Michael Shackleford, A.S.A.