Solved UPSC CDS/OTA Question
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Q · InstallmentsModerate · 45s
In an **equal principal** 5‑year plan at 10% p.a., the **last installment** is ₹25,200. Find the principal.
TopicInstallments
Question Typemultiple choice
DifficultyModerate
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
Every step explained — no skipped algebra.
Last installment = P/5 + (P/5)·0.10 ⇒ P(0.2·1.10) = ₹25200 ⇒ P ≈ ₹114545.45.
Final Answer: Option A — ₹114545.45