Answer
$x_{g2} = 6.00~m$
Work Step by Step
The proper length of the garage is $L_g = 6.00~m$
Since Garageman is in the garage frame of reference, the length of the garage according to Garageman is $6.00~m$
Since the front of the garage is $x_g = 0$, then the back of the garage is $x_g = 6.00~m$
Therefore, $~~x_{g2} = 6.00~m$
