Question

A man can row a boat upstream at 8 km/h and
downstream at 12 km/h. The speed of the stream
is(by relative velocity).
​

Answer 1

Explanation:

Let v be the speed of the stream and u be the speed of the boat. V+u =12

V-u =8

2v=20

V=10m/s

Answer 2

Answer:

10km/h

Explanation:

let speed of boat be x km/h and speed of stream be m km/h

at upstream :

x-m=8

at downstream:

x+m=12

adding both eq u get velocity of boat or speed and then u can call the speed of stream