Question

If the radius of a circle is diminished by 10%, then its area is diminished by:
A.0.1
B.0.19
C.0.2
D.0.3

Answer 1

Area= radius *radius*pi
Let the radius= 10
Area= 100pi
Reduced radious= 9
Area= 81pi
Change in radius =(100-81)pi=19pi
% change in radius =(19pi/100pi)*100=19
Answer 19%. =. 0.19

Answer 2

Answer:

Explanation:

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