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SSC GD 2021 PYQ — Question 61

SSC GD Constable (English) - 23rd November 2021 Shift 1 • Quantitative Aptitude • Q61

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How much time will it take for a sum of Rs. 900 to yield Rs. 810 as interest at 5% per annum of simple interest?

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Correct answer: D

Explanation

The correct answer is option 4 i.e. 18 years

SI = P×R×T100\dfrac{P × R × T}{100}

810 = 900×5×T100\dfrac{900 × 5 × T}{100}

T = 8109×5\dfrac{810}{9 × 5}

T = 18

So the required time is 18 years.