Question: Crossing the River II (a) In which direction should the motorboat in Exercise 3.41 head in order to reach a point on the opposite bank

Crossing the River II (a) In which direction should the motorboat in Exercise 3.41 head in order to reach a point on the opposite bank directly east from the starting point? (The boat's speed relative to the water remains 4.2 m/s.)
(B) What is the velocity of the boat relative to the earth?
(c) How much time is required to cross the river?

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