Solved UPSC CDS/OTA Question
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Q · Simple InterestDifficult · 45s
A invests a total of ₹9000, part at 7% and the rest at 5% p.a. simple interest for 2 years. If the final amount is ₹10,140, how much was invested at 7%?
TopicSimple Interest
Question Typemultiple choice
DifficultyDifficult
Marking+1 / −0.33
Test Duration30 min
← Previous questionQ 30 / 30
Step-by-Step Solution
The complete worked solution.
Every step explained — no skipped algebra.
Amount = 9000 + 2(0.07x + 0.05(9000−x)) = 9900 + 0.04x = 10,140 ⇒ x = 6000.
Final Answer: Option C — ₹6000.00