aliensbrain
  • Home
  • Study
  • Quizzes
  • 🎤AI Practicefree
  • Notebooks
  • Community
  • Sign in
Multiple choice

If the diameter of a circle is doubled, its area will become-

  1. $\(p^2\) times$
  2. Double

  3. $\(2p\) times$
  4. 4 times

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Area of a circle = πr². When diameter is doubled, radius also doubles. New area = π(2r)² = 4πr², which is 4 times the original area. This follows from the square relationship between radius and area.

Keep practicing — related questions

  • What is the ouput of the following Java program? interface A{ double pi=3.14; public double Area(int r); } ...
  • A sector of 60 degrees of a circle has an area of 154/6 sq. cm. Find the radius of the circle.
  • A large solid sphere of diameter 18 cm is melted and recast into several small spheres of diameter 3 cm. Th...
  • Within how many years, a sum of money at a certain rate of compound interest shall become eight times if it...
  • The probability that the length of a randomly chosen chord of a circle lies between $\displaystyle \frac { ...
  • The distance between plates of parallel plates condenser is 2 cm and area of each plate is 31.41 cm2. A gla...
  • interface DoMath { double getArea(int rad); } interface MathPlus { double getVol(int b, int h); } /* Missin...
  • Arrange the following into increasing source of total irrigated area to decreasing source of total irrigate...

Practice this chapter

  • Mensuration (2507 questions)
Advertisement
© Aliensbrain | all rights reserved
  • About
  • Contact
  • Terms and Condition
  • Privacy Policy