A circular piece of wood with an area of 2021 cm2 has a smaller circle cut out from it. The area of the remaining piece is 1211 cm. Find the area of the smaller circle (in terms of a) and the radius of the smaller circle.
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area of outer circle=202πcm
area of remaining piece=121cm So, area of inner circle-area of outer circle-area of remaining piece =(202T-121π)cm
=81Tcm
area of inner circle=Trxr
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