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Question: vector basics 3...

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Vector basics #3

2) A one-half kilometer wide straight river flows at the rate of 4 km per hr. A boat leaves one shore of the river and is steered directly at the opposite shore at all times. If the boat travels at 10 km per hr relative to the water, how far is it away from its starting point when it hits the opposite shore? How long will the trip take? 3) With the same speeds for boat and river as in (2), if the boater wants to land directly across from his starting point, what heading (direction) should he steer towards? How long will that trip take?
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