The speed of a boat in still water is 5km/hr. If the speed of the boat against the stream is 3 km/hr, what is the speed of the stream?
Answer & explanation
Correct answer: option 2
Let,
Speed of boat in still water i.e. x = 5km/hr ----(1)
Speed of stream/current = y
According to the question:
Upstream speed (Us) = 3 km/h i.e. x - y = 3 km/h----(2)
Putting (1) in (2)
x - y = 3
5 - y = 3
y = 2 km/hr