Question 1001613
speed=s
current=c
speed (total) upstream is 224 miles/16 hours or 14 mph.  The speed downstream is 224/8=28 mph
s-c=14 (units in mph)
s+c=28
2s=42
s=21 mph in calm water.  This is the speed of the boat
c=7 mph.  This is the speed of the current.