Question

Someone must get directly across a 160m wide river (from A
to B) in the minimum time. The river's current is 0.8m/s, he can row a boat at 1.5m/s,
and he can run 3m/s. Try to find the best path he can take, and what is the minimum
time for the crossing? t = ?
width of river = 160metres
speed of river = 0.8 m/s

___________B__________
|
0.8m/s --> |
|
|
___________A__________​

Answer 1

Answer:

he can go by running it will take minimum time