Child Labor #12
Draw an asymmetric shaped - 'T', having dimensions of horizontal top AB = 7 with C on AB such that AC = 3. The vertical limb CD = 2015. When this 'T' is rotated in the plane of the paper around center at D, two concentric circles are produced as loci of A and B. Find the area of the annulus produced.
Note: Annulus is the ring-shaped portion between the two loci. Use : .
The answer is 22.
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