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in Mensuration by (15 points)
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now for this first we will begin with finding the area of rectangle or the total area= 60×30 cm^2 =1800 cm^2

now second step we will find that area of small quadrant i.e. 3.14 ×122 / 4 cm^2 = 3.14× 36 cm^2 =113.04 cm^2

Now area of unshaded portion is total - area of quadrant = (1800 - 113.04 )cm^2  = 1686.96 cm^2  = 1687 cm^2(approx )

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