A can do a half of certain work in 70 days and…

A can do a half of certain work in 70 days and B one third of the same in 35 days. They together will do the whole 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 #5943