If an annulus has an inner diameter of d₁ and an outer diameter of d – McqOptions

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1.	If an annulus has an inner diameter of d₁ and an outer diameter of d₂ then the equivalent diameter is
A.	2 d₂ – d₁
B.	d₂ – 2 d₁
C.	d₁ – d₂
D.	d₂ – d₁
Answer» E.

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