Two bullet trains of equal lengths take 10 seconds and 50 seconds…

Two bullet trains of equal lengths take 10 seconds and 50 seconds respectively to cross a telegraph post. If the length of each bullet train be 120 metres, in what time (in seconds) will they cross each other travelling in opposite direction?

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #73210