Two trains, each 100 meters long, moving in opposite directions, completely pass…

Two trains, each 100 meters long, moving in opposite directions, completely pass each other in 12 seconds. If one train is moving twice as fast the other, then what is the speed of the faster train (in km/hr)?

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 #24391