-1500 m- B Veurrent
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Two piers, A and B, are located on a river; B is 1500 m downstream
from A (Fig.). Two friends must make round trips from
pier A to pier B and return. One rows a boat at a constant speed of
4.00 km>h relative to the water; the other walks on the shore at a constant
speed of 4.00 km>h. The velocity of the river is 2.80 km>h in the
direction from A to B. How much time does it take each person to make
the round trip?
Given data
The downstream speed is given by
The upstream speed is given by
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