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A boat travels due east at a speed 40ms-1s across a river flow due south at 30ms-1s. ...

A boat travels due east at a speed 40ms-1s across a river flow due south at 30ms-1s. What is the resultant speed of the boat?
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  • A 1.3ms-1
  • B 10.0ms-1
  • C 50.0ms-1
  • D 70.0ms-1
Correct Answer: Option C
Explanation:

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