The speeds of 3 cars in the ratio 2:3:4

The speeds of 3 cars in the ratio 2:3:4. The ratio between time taken by them to travel the same distance is?

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 #18456