Two goods trains each 500 m long are running in opposite directions…

Two goods trains each 500 m long are running in opposite directions on parallel tracks. Their speeds are 42 km/hr and 30 km/hr respectively. Find the time taken by the slower train to pass the driver of the faster one?

This problem repeats another one in the library (at most with different numbers), so it's left out of browsing.

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #7429