the circumference of two circles are in the ratio 1 : 3 find the ratio of their areas
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Answered by
1
Answer:
let the radii of the two circles be R1 and R2
circumference of a circle = 2πr
therefore
2πR1/2πR2 = 1/3
R1/R2 = 1/3
therefore 3R1 = R2
ratio of areas:
area of a circle = πr²
therefore
πR1²/π(3R1)²
= R1²/9R1²
= 1/9
HOPE IT HELPS!!!!!!!!!!!!!!!!
Answered by
12
Step-by-step explanation:
The circumference of a circle is given by 2*pi*r. Multiply R1 and R2 by 2*pi, we get 2*pi*R1 : 2*pi*R2 = 1:5. Therefore the circumference of the two circles is in the ratio 1:5
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