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 · Internal Structure of The EarthMedium · 45s
The depth of the Lehmann Discontinuity is around:
TopicInternal Structure of The Earth
Question Typemultiple choice
DifficultyMedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
Every step explained — no skipped algebra.
The Lehmann Discontinuity separates the outer and inner core.
Final Answer: Option D — 5,100 km