A and B together can do a piece of work in 3…

A and B together can do a piece of work in 3 days. If A alone can do the same work in 20 days, then B alone can do the same work in?

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 #19470