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A sum of Rs. 2500 becomes Rs. 8100 in 2 years at a certain rate of compound interest. What will be the sum (in Rs.) after 4 years?1). 298242). 362843). 416244). 26244 |
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Answer» Principal = 2500 & Amount = 8100 As we KNOW, A = P (1 + r/100)2 ⇒ (1 + r/100)2 = 81/25 ⇒ 1 + r/100 = 9/5 ⇒ r = 80% Amount after 4 years A = 2500 (1 + 80/100)4 ⇒ A = 2500 × 9/5 × 9/5 × 9/5 × 9/5 ∴ A = 26244 |
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