Question 1160536
current speed=c
upstream speed is 18-c mph
and  in 44 minutes, the boat goes (44/60)(18-c) miles
downstream it goes 18+c mph and in 28 minutes goes (28/60)(18+c) miles
Those are equal 
the 60s cancel out
so 44(18-c)=28(18+c)
792-44c=504+28c
288=72c
c=4 mph

upstream 14 mph net and goes 14*44/60 miles or 10.267 miles
downstream 22 mph and goes 22*28/60 miles or 10.267 miles