Solved UPSC CDS/OTA Question
A solved UPSC CDS/OTA PYQ — decoded step-by-step.
Solve it the standard way once — then learn the shortcut.
Q · Simple InterestModerate · 45s
Two equal sums are invested at 6% and 9% p.a. simple interest. Together they earn ₹675 in 2.5 years. Find each sum.
TopicSimple Interest
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.
Let each be ₹P. Total SI = P×2.5×(6+9)/100 = 675 ⇒ P = ₹1800.
Final Answer: Option D — ₹1800.00