A sphere of radius 10 cm sits on a straight horizontal line. It then drops at a constant rate of 1 cm/s until the entire sphere is below the line, after 20s. Could anybody tell me a formula for how to calculate the volume of the sphere that is below the line at any time < 10s? Volume of a sphere = (4/3) × pi × r^{3 I'd be grateful for any help. }

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