Rohit can row downstream 32 km in 4 hours and 4km upstream in an hour. Find his speed of rowing in still water and speed of the current.
6 km/hr, 2 km/hr
Let speed of Rohit rowing in still water be x km/hr
and speed of current be y km/hr.
Then, Speed downstream = (x + y) km/hr
Speed upstream = (x - y) km/hr
We know that,
Time=DistanceSpeed
4=32x+y and 1=4x−y
⇒ x+y=8 ⋯(1)
⇒x−y=4 ⋯(2)
On adding (1) and (2), we get
2x=12
⇒x=6
On substituiting x=6 in (1), we get
6+y=8
⇒y=2
∴ The rowing speed in still water is 6 km/hr and the speed of current is 2 km/hr.