The solution given assumes the radius of the half-cone is 12 cm. If 12 cm represents the diameter or some other parameter, then the solution is incorrect. The radius of the half-cone would need to be determined and an appropriate proportional relationship between the water height and water radius established before the rest of the calculation can be completed. Lesson: Proofread your posts before you click 'Send'.
John
My calculator said it, I believe it, that settles it
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