Answer:
The magnitude of B is [tex]10.95\ units[/tex]
Explanation:
we know that
The magnitude of Vector B is
[tex]B=\sqrt{x^{2}+y^{2}+z^{2}}[/tex]
where
x,y and z are the components of vector B
we have
[tex]x=8.7\ units, y=1.4\ units,z=6,5\ units[/tex]
substitute
[tex]B=\sqrt{8.7^{2}+1.4^{2}+6.5^{2}}[/tex]
[tex]B=\sqrt{119.9}[/tex]
[tex]B=10.95\ units[/tex]
