Allied & ICAR Exam Bank • ALLIED_1948 MCQ • 2 Marks

Section 8: General Aptitude

Quantitative Aptitude

Subtopic: Ratios & Percentages

Question Statement:

The surface area of a sphere decreases by 19%. The percentage by which its radius decreased is:

Options:

  • (A) 10%
  • (B) 9.5%
  • (C) 12%
  • (D) 8%

Answer Key:

A

Step-by-Step Solution & Explanation

Area factor $= 1 - 0.19 = 0.81$. Radius factor $= \sqrt{0.81} = 0.90$, meaning a 10% decrease.
← Previous (ALLIED_1947) Next (ALLIED_1949) →

Practice In Authentic CBT Exam Interface

Test your skills under authentic timed conditions with live scoring and AIR percentile ranking.

Launch CBT Mock Test