Water is flowing at a steady rate through a homogeneous and saturated horizontal soil strip of $10 \mathrm{~m}$ length. The strip is being subjected to a constant water head $(H)$ of $5 \mathrm{~m}$ at the beginning and $1 \mathrm{~m}$ at the end. If the governing equation of flow in the soil strip is $\frac{d^{2} H}{d x^{2}}=0$ (where $x$ is the distance along the soil strip), the value of $H($ in $m)$ at the middle of the strip is

Water is flowing at a steady rate through a homogeneous and saturated horizontal soil strip of $10 \mathrm{~m}$ length. The strip is being subjected to a constant water head $(H)$ of $5 \mathrm{~m}$ at the beginning and $1 \mathrm{~m}$ at the end. If the governing equation of flow in the soil strip is $\frac{d^{2} H}{d x^{2}}=0$ (where $x$ is the distance along the soil strip), the value of $H($ in $m)$ at the middle of the strip is

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