The diagonal of a rhombus are 40 m and 30 m

The diagonal of a rhombus are 40 m and 30 m. Its area 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 #5647