For calculating the permissible stress 0 y /[(1 + a(l/r)²] is the empirical formula, known as__________________?

For calculating the permissible stress 0 y /[(1 + a(l/r)²] is the emp

1.	For calculating the permissible stress 0 y /[(1 + a(l/r)²] is the empirical formula, known as__________________?
A.	Straight line formula
B.	Parabolic formula
C.	Perry’s formula
D.	Rankine’s formula
Answer» E.

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For calculating the permissible stress 0 y /[(1 + a(l/r)²] is the empirical formula, known as__________________?

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