if the radius of a circle is increased by 100%,by what percent is the area of the circle increased?
Solution
Correct Answer: Option C
My Examiner Solution- By Applying Successive Rate Increase Or Decrease Formula- A+B+(A*B)/100
=100+100+(100*100)/100
=100+100+100 =300%
Or, Let,Regular Radius=10
So,Increased Radius=10+(100% of 10)=20
Now,Radius Ratio=Regular Ratio:Increased Ratio=102 :202=100:400
So Increased In %=400-100=300%
=100+100+(100*100)/100
=100+100+100 =300%
Or, Let,Regular Radius=10
So,Increased Radius=10+(100% of 10)=20
Now,Radius Ratio=Regular Ratio:Increased Ratio=102 :202=100:400
So Increased In %=400-100=300%
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