The true discount on Rs

The true discount on Rs. 1760 due after a certain time at 12% per annum is Rs. 160. The time after which it is due 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 #12009