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April 23, 2014

Homework Help: Maths

Posted by Math's Noob on Sunday, January 8, 2012 at 4:39pm.

The radii of three concentric circles are 2cm, 3cm and 4cm
Find the ratio of the shaded areas A (the second circle from the inside) and B(the outer circle)
(Hint: don't substitute for pi)

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