Question 815575: The sum of radii of two circles is 10.5 cm and the difference of their circumferences is 13.2 cm. Find the radii of the two circles.
Answer by TimothyLamb(4379)   (Show Source):
You can put this solution on YOUR website! c = 2pi*r
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m = radius of smaller circle
n = radius of larger circle
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m + n = 10.5
m = 10.5 - n
2pi*n - 2pi*m = 13.2
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2pi*n - 2pi*m = 13.2
n - m = 13.2/2pi
n - m = 2.1008452
n - (10.5 - n) = 2.1008452
n - 10.5 + n = 2.1008452
2n = 12.600845
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n = 6.3004226
m = 4.1995774
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