the area of a circle is 100 times to another then what is the ratio of its circumference
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Answered by
1
Let the area of the two circles be A & A' respectively
The circle having bigger area will be the circle with area A'.
Now
A : A' = 1:100
π r^2 : π r'^2 = 1:100
r^2 : r'^2 = 1 : 100
r : r' = 1 : 10.
Ratio of their circumference
= 2 π r : 2 π r'
= r : r'
= 1 : 10.
hope this helps...
The circle having bigger area will be the circle with area A'.
Now
A : A' = 1:100
π r^2 : π r'^2 = 1:100
r^2 : r'^2 = 1 : 100
r : r' = 1 : 10.
Ratio of their circumference
= 2 π r : 2 π r'
= r : r'
= 1 : 10.
hope this helps...
Answered by
0
All circles are similar.
The ratio of their areas is the same as the ratio of the squares of their radii.
(rA)2(RB)2=1100 rA=3.2
3.22(RB)2=1100
(RB)2=3.22×100 ←find the square root
RB=3.2×10=32
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