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A rocket consists of a right circular cylinder of height 30 m surmounted by a cone whose height and diameter are equal and whose radius

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A rocket consists of a right circular cylinder of height 30 m surmounted by a cone whose height and diameter are equal and whose radius is the same as that of the cylindrical section. What should this radius be (correct to two decimal places) if the total volume is to be 150/7m ? 30 m

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