Walking at 1/3th of its usual speed a cab is 20mnts late

Walking at 1/3th of its usual speed a cab is 20mnts late. Find its usual time to cover the journey?

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

~8 minAnswer checked instantly

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #35086

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