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An outside circular ring has a circumference of 60 cm. What is the circumference of an inner ring which is 5 cm shorter in radius? Both circ
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An outside circular ring has a circumference of 60 cm. What is the circumference of an inner ring which is 5 cm shorter in radius? Both circ
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Question 442446: I need help with solving this problem?
An outside circular ring has a circumference of 60 cm. What is the circumference of an inner ring which is 5 cm shorter in radius? Both circles have the same center. Answer by rwm(914) (Show Source):
You can put this solution on YOUR website! c=2*pi*r
60=2*pi*r
60/(2*pi)=r
60/(2*pi)-5=R
C=2*pi*R
C1 = -10 (pi-6), R = -(5 (pi-6))/pi
C=28.5841, R=4.5493
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