If Re.1 amounts to Rs.9 over a period of 10 years

If Re.1 amounts to Rs.9 over a period of 10 years. What is the rate of simple interest?

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 #6737

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