Formula for air density factor

Q.  Air density factor which depends on the pressure and temperature is given by which of these formulas?
- Published on 24 Nov 15

a. δ = (5.92 * b) / (273 + t)
b. δ = (7.92 * b) / (273 + t)
c. δ = (3.92 * b) / (273 + t)
d. δ = (4.92 * b) / (273 + t)

ANSWER: δ = (3.92 * b) / (273 + t)

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