A boat goes 8 km in 1 hr along the stream and 2 km in 1 hr against the stream. The speed in Km/hr of the stream is

1 2 3 4

3

Speed of boat in still water - x Speed of stream/current - y According to the question: Upstream speed i.e. x - y = 2 km/hr -----(1) Downstream speed i.e. x + y = 8 km/hr ------(2) Speed of stream i.e. y = ? Subtracting (1) from (2) x + y - x + y = 8 - 2 2y = 6 y = 3 km/hr