Difference between the length &breadth of a rectangle is 15 m

Difference between the length &breadth of a rectangle is 15 m. If its perimeter is 90 m, then 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 #1356