Two drivers began their journey with the same amount of petrol in…

Two drivers began their journey with the same amount of petrol in their cars at the same time. The only difference is that the first driver�s car could drive 4 hours in that amount of petrol and the second one could drive 5 hours. However, they only drove for some time and found that the amount of petrol that was left in one of the cars was four times the petrol left in the other one. For how long had they driven at this point of time?

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #20784