Molly can do a task in 20 days while Sandy can do…

Molly can do a task in 20 days while Sandy can do the task in 30 days. How many days will it take to complete the task if both work together?

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 #31363