Calculating Resultant Velocity for Two Equal Velocities at Right Angles

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To calculate the resultant velocity of two equal velocities at right angles, the velocities are treated as vectors. When two velocities of 100 km/h are at right angles, the resultant velocity is found using the Pythagorean theorem. The calculation involves multiplying one side by the square root of 2, leading to a resultant velocity of approximately 141.4 km/h. This approach confirms that the resultant velocity increases due to the vector nature of the velocities. Understanding vector addition is crucial for solving such problems.
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can someone help me with this question:
Calculate the resultant velocity of a pair if 100 km/h velocities at right angles to each other

i don't even understand what the question is asking me
 
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Velocities are represented with vectors, so use http://www.codesampler.com/d3dbook/chapter_02/chapter_02_files/image012.jpg" . However, for different vector orientations, you get different resultant velocities.
 
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k thank you, that helped a lil...would this be the right answer then:

Since both velocities are equal we have to times one of the sides by the square root of 2. Which means that the reluctant velocity is 141.4.
 
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