Topic Area
Asked 3 times across 2 UPSC exams over 6 years (2015–2021), peaking in 2015.
Key insights
- Most tested in EPFO — 2 of 3 PYQs
- Most asked in 2015
- Recurs across 2 years (2015–2021)
How it travelled across exams
First appearance in each exam — the same idea, reframed.
EPFO 2015 → CISF 2021
How the concept evolved
Long-running — most appearances (2 of 3) predate 2016, and it still returns.
Related concepts
Ideas UPSC tests alongside this one — keep exploring.
Sample questions
You've seen the pattern — here are a few of the actual PYQs.
CISF2021
Consider a square of side length 2 m. What is the difference of the areas of the circumscribed circle and the inscribed circle (in m²) ?
- A 3π/2
- B π/2
- C 2π
- D π ✓
✓ Correct answer: (D)
Quantitative Aptitude › Geometry & Mensuration
EPFO2015
The original lay of a rectangular plot ABCD on open ground is 80 m long along AB, and 60 m wide along BC. Concreted pathways are intended to be laid on the inside of the plot all around the sides. The pathways along BC and DA will mutually be of equal widths such that the un-concreted internal plot will measure three-fourth of the original area of the plot ABCD. What will be the width of each of these pathways along AB and DC ?
- A 3 m
- B 4 m
- C 5 m ✓
- D 6 m
✓ Correct answer: (C)
Quantitative Aptitude › Geometry & Mensuration
EPFO2015
If the radius of a circle is reduced by 50%, its area will be reduced by
- A 30%
- B 50%
- C 60%
- D 75% ✓
✓ Correct answer: (D)
Quantitative Aptitude › Geometry & Mensuration
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