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Find the principal which becomes Rs. 2648 after getting 10% compund interest per annum for 3 years. |
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Answer» Let the principal `=Rs. x` `:.` The amount of Rs. `x` in 3 years at the rate of compound interest of 10% per annum `=Rs.x xx(1+10/100)^(3)` `=Rs. x xx(11/10)^(3)` `impliesRs.x xx1331/1000` `:.` The compound interet `=Rs. (x xx1331/1000-x)` `=Rs. (1331x-1000x)/1000=Rs. (331x)/1000` As per question `(331x)/1000=2648impliesx=(2648xx1000)/331=8000` Hence the required principal `=Rs. 8000 |
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