According to Rankine’s formula, the minimum depth of foundation (h) computed with gross bearing capacity (p), density of soil (γ) and angle repose (ϕ) is:

\(h = \frac{p}{\gamma }{\left[ {\frac{{1 + \sin \phi }}{{1 - \sin \phi }}} \right]^2}\)

\(h = \frac{p}{\gamma }{\left[ {\frac{{1 - \sin \phi }}{{1 + \tan \phi }}} \right]^2}\)

\(h = \frac{\gamma}{p }{\left[ {\frac{{1 - \sin \phi }}{{1+ \sin \phi }}} \right]^2}\)

\(h = \frac{p}{\gamma }{\left[ {\frac{{1 - \sin \phi }}{{1 + \sin \phi }}} \right]^2}\)

According to Rankine’s formula, the minimum depth of foundation (h)

1.	According to Rankine’s formula, the minimum depth of foundation (h) computed with gross bearing capacity (p), density of soil (γ) and angle repose (ϕ) is:
A.	\(h = \frac{p}{\gamma }{\left[ {\frac{{1 - \sin \phi }}{{1 + \tan \phi }}} \right]^2}\)
B.	\(h = \frac{\gamma}{p }{\left[ {\frac{{1 - \sin \phi }}{{1+ \sin \phi }}} \right]^2}\)
C.	\(h = \frac{p}{\gamma }{\left[ {\frac{{1 - \sin \phi }}{{1 + \sin \phi }}} \right]^2}\)
D.	\(h = \frac{p}{\gamma }{\left[ {\frac{{1 + \sin \phi }}{{1 - \sin \phi }}} \right]^2}\)
Answer» D. \(h = \frac{p}{\gamma }{\left[ {\frac{{1 + \sin \phi }}{{1 - \sin \phi }}} \right]^2}\)

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According to Rankine’s formula, the minimum depth of foundation (h) computed with gross bearing capacity (p), density of soil (γ) and angle repose (ϕ) is:

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