The radius 2

The radius of a circle is increased by 5%. What is the percentage increase in their circumference area?

Correct answer:

p2 =  10.25 %

Step-by-step explanation:

p1=100%+5%=1+1005=1.05  r2 = p1 r  S1 = π r2 S2 = π r22 = π (p1 r)2 = S1   p12  k = S1S2 = S1S1   p12  k=p12=1.052=400441=1.1025  p2=100 (k1)=100 (1.10251)=10.25%



Did you find an error or inaccuracy? Feel free to write us. Thank you!







Tips for related online calculators
Our percentage calculator will help you quickly calculate various typical tasks with percentages.

You need to know the following knowledge to solve this word math problem:


 
We encourage you to watch this tutorial video on this math problem: video1

Related math problems and questions: