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SSC Selection Post 2019 PYQ — Question 54

SSC Selection Post - Matriculation Level 2019 - 15 Oct 2019 • Quantitative Aptitude • Q54

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The compound interest on a sum of ₹18400 at 10% p.a. for a certain period of a time is ₹3864. What is the simple interest on the same sum at the same rate for double the time?

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Correct answer: C

Explanation

The correct answer is Option 3 i.e. ₹7360

Principal = ₹18,400

CI = ₹3,864 at 10% p.a.

Amount = 18400 + 3864 = ₹22,264

CI formula use :

22264=18400 × (1.1)t ⇒ (1.1)t =1.21

⇒t = 2 years

Double time = 4 years

SI = P×R×T100=18400×10×4100=₹7360\frac{P \times R \times T}{100} = \frac{18400 \times 10 \times 4}{100} = ₹7360