The Moving Rows Paradox

# At a given time the trains are positioned as in first figure.
# A second later they are all aligned as shown in next figure.
# Look at train B: in one second it has move the length of ONE carriage past train A, right?
#But at the same time it has moved two carriages past train C!!

The paradox is that train B has moved a distance and twice that distance at the same TIME!!!!