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A certain sum is invested under simple interest for 9 years at a certain rate of interest. Had the rate of interest been 1% more, the interest for 9 years would have been Rs. 234 more. Find the sum.1. Rs. 35002. Rs. 26003. Rs. 25004. Rs. 3600 |
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Answer» Correct Answer - Option 2 : Rs. 2600 Given: A certain sum is invested under simple interest for 9 years at a certain rate of interest. Had the rate of interest been 1% more, the interest for 9 years would have been Rs. 234 more. Formula: S.I = PRT/100 Where, P = Principal R = Rate of interest T = Time taken Calculation: Let the sum be P and rate of interest be r [(P × r × 9)/100] + 234 = [P × (r + 1) × 9]/100 ⇒ 234 = P × (9/100) ⇒ P = 234 × (100/9) ⇒ P = Rs. 2600 ∴ The sum is Rs. 2600 |
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