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1). Rs. 3160 2). Rs. 4120 3). Rs. 3972 4). Rs. 6254 |
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Answer» Let the rate of INTEREST be r% Simple interest = (PRINCIPAL × rate × time)/100 = (principal × r × 6)/100 Now, Amount = principal + simple interest Principal + 60% of principal = principal + {(principal × r × 6)/100} ⇒ 1.6 = 1 + 0.06r ⇒ 0.6 = 0.06r ⇒ r = 10% Now, ⇒ COMPOUNDED Amount = principal {1 + (rate/100)}time = 12000{1 + (10/100)}3 = 12000 × 1.1 × 1.1 × 1.1 = 15972 ∴ Interest = Amount – principal = 15972 – 12000 = Rs. 3972 |
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