Adding vectors given just the magnitude

[mrknowknow]

Homework Statement

The problem is attached

Homework Equations

sqrt(a^2+b^2)

The Attempt at a Solution

I used the equations above to calculate the resultant but apparently it wasn't right.

 

[haruspex]

It's a very poor question. Clearly some are equal, so there's no right way to fill those in. Others you cannot rank without making an estimate of the angle between the vectors from the diagram, so I suggest you do exactly that - get the protractor out. By eye, I'd say |B| > |A-B|, but it's a close call.

 

[mrknowknow]

But this was on a test so do you think we were suppose to estimate the angle between the two?

 

[haruspex]

But this was on a test so do you think we were suppose to estimate the angle between the two?

If you were not given the angle then I see no alternative.