Answers

2016-05-04T10:56:31+05:30
By reading the past books that are written by the great people and also by some of the evidences.
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hope it helps u plz mark it as brainliest
by taking help from net or reading books,observing historical pictures etc.
2016-05-04T14:29:57+05:30
By taking help from net or by reading books and information carved on walls stones etc. or by observing old pictures..


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