A bullet train traveling 210 km/h is catching up to a freight train traveling 90 km/h on a parallel track. From the time the front of the bullet train catches up to the back of the freight train to the time the back of the bullet train pulls even with the front of the freight train 24 seconds elapse. If freight trains are three times as long as bullet trains, how many seconds would it take two bullet trains, each traveling at 210 km/h, to pass by each other completely when moving in opposite directions? Express your answer as a decimal to the nearest hundredth.