Solved UPSC CDS/OTA Question
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Q · Simple InterestDifficult · 45s
At what time will the simple interest be one-fourth of the principal on ₹6400 at 8% p.a.?
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 SI = P/4. Then T = (SI×100)/(P×R) = (P/4×100)/(P×8) = 25/8 = 3.125 years.
Final Answer: Option A — 3.125 years