Problem 3-9 - Vector sum - (a)

Find the magnitude and direction of the sum of the vectors $A + B + C$ using the component technique. Assume two significant digits.
$A = 20\; km$ north, $B = 30\; km$ east, $C = 50\; km\; 55 ^\circ$ west of north.

Of course all choices are permissible but to choose $x$ and $y$ at an angle to the cardinal directions will complicate the solution.
 
 

Try again.