One of the largest hailstones ever recorded in the United States measured 8 inches [in] in diameter. Assume the specific gravity of hail is 0.75 and assuming that all hailstones are perfect spheres. Calculate the speed of the hailstone just before it hit the ground in miles per hour [mph] if the hailstone fell from a height of 400 feet [ft] above the ground. You may assume air resistance is negligible.

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