A boat heads north at 3 m/s while the current flows east at 4 m/s. What is its resultant speed?
A7 m/s
B5 m/s
C1 m/s
D12 m/s
Answer & Solution
Correct answer: B. 5 m/s
The two velocities are perpendicular, so the resultant speed is the square root of 9 + 16, or 5 m/s.
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