Problem 3-9 - Vector sum - Part 2 (b)

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.

Correct!

We now require the sum $\text{R = A + B + C.}$
 
The length of the vector $\text{R}$ is $20 + 30 + 50 = 100\; km$

True

False