Let the speed of the man rowing in still water be x km/hr and the speed of the stream be y km/hr. Speed of the man against the stream = (x - y) km/hr Speed of the man with the stream = (x + y) km/hr Distance covered by the man = 18 km ∴(x−y)×10=18 ⇒x−y=1.8km/hr....(1) Hence, statement 1 is correct. (x+y)×4=18 ⇒x+y=4.5km/hr....(2) Adding (1) and (2), we get 2x=1.8+4.5=6.3 ⇒x=3.15km/hr Hence, statement 2 is correct. Putting x=3.15 in (2) we get y=4.5−3.15=1.35km/hr