Special relativity

1. Mar 19, 2012

shyguy79

1. The problem statement, all variables and given/known data
-------------->Va Vb<---------------
FRAME REF A FRAME REF B

-------------------------------------------- Stationary frame ref C

An observer using the frame Ref A, calculate the length of ship B and the time it takes for the whole of ship B to pass by the whole of ship A. Answer as a multiple of ΔtA.

2. Relevant equations
$\gamma=\frac{1}{\sqrt{1-\frac{v^{2}}{c^{2}}}}$
$L_{0}=\gamma L$
$\delta T=\gamma\delta T_{0}$

3. The attempt at a solution
I think that $\frac{L_{A}}{\gamma}=L_{C}$ but this is where I'm stuck... how do I find the time using what little i have?