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The simple interest on a certain sum at 5% per annum for 3 years and 4 years differ by Rs.42. The sum is:1. Rs. 7502. Rs. 2103. Rs. 2804. Rs. 840 |
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Answer» Correct Answer - Option 4 : Rs. 840 Given: Difference in simple interest of 4 years and 3 years = Rs. 42 Rate of interest = 5% Formula used: SI = (P × R × T)/100 Calculation: Simple interest for 1 year = Difference in simple interest of 4 years and 3 years ⇒ Simple interest for 1 year = Rs, 42 ⇒ (P × R × T)/100 = 42 ⇒ (P × 5 × 1)/100 = 42 ⇒ P = 42 × 100/5 = 42 × 20 = 840 ∴ The sum is Rs. 840 |
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