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find vertical and horizontal stress at a depth of $150$ m from surface if the poisson's ratio is $0.23$ and $0.28$ in two horizontal direction i.e along $X -$ and $Y - a x i s$ respectively. If the average unit weight is $25 K N / m^{3}$ Identify the direction of minimum and maximum horizontal stresses Comment on isotropy and anisotropy in-situ streees condition.

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