Which one of the following is the correct formula for the equivalent diameter for square pitch?

D = ( frac{4(0.86 Pt^2- frac{ OD^2}{4})}{ OD} )

D = ( frac{4(Pt^2- frac{ OD^2}{4})}{ OD} )

D = ( frac{4(0.86 Pt^2- frac{ OD^2}{4})}{ OD} )

D = ( frac{( frac{0.86}{2}Pt^2- frac{ OD^2}{4})}{ frac{ }{2}OD} )

D = ( frac{4( frac{0.86}{2}Pt^2- frac{ OD^2}{4})}{ frac{ }{2}OD} )

Which one of the following is the correct formula for the equivalent d

1.	Which one of the following is the correct formula for the equivalent diameter for square pitch?
A.	D = ( frac{4(Pt^2- frac{ OD^2}{4})}{ OD} )
B.	D = ( frac{4(0.86 Pt^2- frac{ OD^2}{4})}{ OD} )
C.	D = ( frac{( frac{0.86}{2}Pt^2- frac{ OD^2}{4})}{ frac{ }{2}OD} )
D.	D = ( frac{4( frac{0.86}{2}Pt^2- frac{ OD^2}{4})}{ frac{ }{2}OD} )
Answer» B. D = ( frac{4(0.86 Pt^2- frac{ OD^2}{4})}{ OD} )