In a shower, 6 cm of rain falls

In a shower, 6 cm of rain falls. The volume of water that falls on 1.5 hectares of ground is:

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 #71704