Question 1055005
r the speed of the boat in still water , c the speed of the current 
r - c = 8mph {{{24mi/3hr}}}
r + c = 16mph {{{48mi/3hr}}}
2r = 24mph
r = 12mph, the speed of the boat in still water
c = 4mph, the speed of the current {{{12-c = 8}}}