1. The problem statement, all variables and given/known data A spaceship moves past you at speed v. You measure the ship to be 300 m long, whereas an astronaut on the ship measures a length of 356 m. Find v. 2. Relevant equations L=L1sqrt(1-v^2/c^2) 3. The attempt at a solution I have tried this by using the above formula. I plugged in 300 for L and 356 for L1 and I have tried it the other way as well where I plug in 300 for L1 and 356 for L. The answer is in terms of c. I only have one try left and dont understand what Im doing wrong.