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khiahaggard
16

LOTS OF POINTS!!!!! How many years did it take the modern engineers to figure out how the roman concrete was made out of? PLS GIVE ME THE ACCURATE NUMBER, ITS FOR A PROJECT!!!

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(1) Answers
MellissaGrich

Based on some research, I believe the answer to your question is about 2000 years. Hope this helps! Let me know if I can help you in the future.

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