Question: A concrete-lined drainage ditch has a triangular cross section that is an equilateral triangle, $8 mathrm{ft}$ on each side. The ditch has a slope of

A concrete-lined drainage ditch has a triangular cross section that is an equilateral triangle, $8 \mathrm{ft}$ on each side. The ditch has a slope of $3 \mathrm{ft} / \mathrm{mile}$. What is the flow capacity of the ditch in gpm?

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