a small metallic washer is of 7 mm radius with a hole of 3.5 mm radius what is the area of the washer
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Total area=πr square=154
Hole area-πr square =38.5
area of washer =154-38.5=115.5mm square
Hole area-πr square =38.5
area of washer =154-38.5=115.5mm square
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