If I walk at 5 km/h, I miss the bus by 9…

If I walk at 5 km/h, I miss the bus by 9 minutes. If I walk at 3 km/h, I reach 6 minutes before the arrival of the bus. How far I walk to reach the bus stand ?

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 #51221