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A boat heads straight across a river at 4 m/s in still water while the current is 3 m/s. Its speed relative to the bank is:
A7 m/s
B1 m/s
C5 m/s
D3.5 m/s
Answer & Solution
Correct answer: C. 5 m/s
The velocities are perpendicular, so the resultant is the square root of 16 + 9 = 5 m/s.
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