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  9. Q5

UKPSC PCS 2012 · Question 5 of 78

If the radius of a circle is doubled, its area increases by

Quant

  1. A100%
  2. B200%
  3. C300%Correct
  4. D400%

Answer: C. 300%

Explanation

Area = πr². Doubling radius gives 4πr², an increase of 3πr² = 300%.

Source: UKPSC 2012 Prelims CSAT Paper-II (adda247 PDF)

← Q4View full paper (78 questions)Q6 →

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