1e A small metallic washer is of 7 mm radius with a hole of 3.5 mm rad – InterviewSolution

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1.	1e A small metallic washer is of 7 mm radius with a hole of 3.5 mm radius. What is the area of thewasher?the
Answer» Area of washer(including hole)=πr^2=22/777=227=154mm^2area of hole=πr^2=22/73.53.5=220.53.5=221.75=38.5mm^2area of washer(excluding hole)=154-38.5=115.5mm^2

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