A reduction of 10% in the price of salt enables a lady…

A reduction of 10% in the price of salt enables a lady to obtain 20kgs more for Rs.400, find the original price per kg?

This problem repeats another one in the library (at most with different numbers), so it's left out of browsing.

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AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #21707

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