Solved UPSC CDS/OTA Question
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Q · Simple InterestDifficult · 45s
₹9000 is split into two parts, one at 9% and the other at 6% p.a. simple interest, so that the difference of interests after 2 years is ₹180. How much is invested at 9%?
TopicSimple Interest
Question Typemultiple choice
DifficultyDifficult
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
Every step explained - no skipped algebra.
Let ₹x at 9% and ₹(9000−x) at 6%. 2(0.09x − 0.06(9000−x)) = 180 ⇒ x = 4200.
Final Answer: Option D - ₹4200.00