a men rows 30km downstream in 5 hours and return upstream through the same distance in 15 hours .find the rate at which he rows in still water and the speed of the stream
Answers
Answered by
0
Answer:
Let the speed of man is u and that of current is v
Downstream speed will be u+v
Upstream speed will be u−v
He travels 30 km downstream in 5 hrs
So, downstream speed is
5
30
=6 km/hr
Similarly upstream speed will be
5
18
=3.6 km/hr
So, u+v=6
⇒u−v=3.6
Subtracting both the equations;
⇒2v=2.4
⇒v=1.2 km/hr
Similar questions