Question: Two piers, A and D. are located on a river, B is 1500 m downstream from A (Fig. E3.31). Two friends must make round trips

Two piers, A and D. are located on a river, B is 1500 m downstream from A (Fig. E3.31). Two friends must make round trips from pier A to pier B and return. One rows ab stant speed of 4.00 km/h relative to the water; the other walks 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

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