2009 hsc paper (1 Viewer)

[fullonoob]

hey im a bit confused for 2009 hsc paper
multiple choice question 5
the answer is D
but the measurement is 7.3cm
x100 = 7.3m

the answer is 8m. I think it is because it takes more wire to hold the beam in place? I just thought it was logical but not 100% sure if it is correct.
Edit: actually its very reasonable, it has to be 8m.
Sorry for the post

 

[scorch62]

Scale gets a bit screwy if it isn't the original. You're probably right.