The circumference of a compact disc is 28.26 cm. what is its radius?
Answers
Answered by
3
We know that Circumference of a circle is 2πr, where r is the radius of the circle. Hence the radius of the compact disk ( CD ) is 4.5 cm.
Answered by
27
Solution:
Circumference = 28.26cm
Radius = ?
C = 2πr
r = C/2π
r = 28.26/2 × 22/7
r = 28.26/44/7
r = 28.26×7/44
r = 197.82/44
r = 4.5cm
Therefore, radius of a compact disc is 4.5cm.
Additional Information:
Circumference of a sircle = 2πr
Area of a circle = πr^2
Area of an ellipse (axes a,b) = πab
Surface of sphere = 4π r^2
Volume of a cylinder = πr^2 h.
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