A can do a work in 9 days and B can do…

A can do a work in 9 days and B can do the same work in 18 days. If they work together, in how many days will they complete the work?

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 #71433