Answer :

kopal
the simple interest for 1 year is = Rs.( 854 - 815) = Rs. 39.
the simple interest for 3 years is = Rs. ( 39 * 3) = Rs.117.
therefore, the principal = Rs. (815 - 117) = Rs. 698.

the answer is Rs. 698.
Hope this helps u !!!!!!!!

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