A Boat Crosses a Stream Which Is Flowing at 10 $\theta$

question 72

Multiple Choice

A boat crosses a stream which is flowing at 10.0 m/s.The driver of the boat wants to cross the river and arrive directly across the river from where he departed (point A to point B) .What boat speed in m/s is needed to go directly across the river if the driver steers upstream with $\theta$ = 30.0 ^$\circ$ as shown?

• A)7.5
• B)10.0
• C)15.0
• D)20.0
• E)25.0

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