an iron was made by cutting out from A circular plate of radius 4 cm A concentric circular plate of radius 2 cm ( see fig ). what is the area of a face of the washer
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Answer:
37.68 cm²
Step-by-step explanation:
R=4 cm, r=2 cm
Area of washer =π(R+r)(R−r)
=3.14(4+2) (4–2)
=3.14×6×2
=3.14×12
= 37.68 cm²
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