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A sum of Rs 720 amounts to Rs 882 at simple interest in \(1\frac{1}{2}\) years. In how many years will the sum Rs 800 amounts to Rs 1040 at the same rate?1). 25/72). 43). 31/74). 2 |
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Answer» GIVEN: Principal = Rs. 720 Amount after 3/2 years = Rs. 882 We KNOW that, A = P + (P × R × T)/100 ⇒ 882 = 720 + (720 × R × 3/2)/100 ⇒ 16200 = 720 × R × 3/2 ⇒ R = 16200/(720 × 1.5) ⇒ R = 15% New Principal = Rs. 800, new Amount = Rs. 1040 ⇒ 1040 = 800 + (800 × 15 × t)/100 ⇒ 24000 = 800 × 15 × t ⇒ t = 2 years ∴ the correct option is 4) |
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