One pipe can fill a pool 1.5 times faster than a second…

One pipe can fill a pool 1.5 times faster than a second pipe. When both pipes are opened, they fill the pool in four hours. How long would it take to fill the pool if only the slower pipe is used?

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #94555