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Mathematics, 04.03.2020 04:13 emmybear103002

The horsepower (hp) that a shaft can safely transmit varies jointly with its speed (in revolutions per minute (rpm)) and the cube of the diameter. If the shaft of a certain material 2 inches in diameter can transmit 16 hp at 120 rpm, what must the diameter be in order to transmit 30 hp at 100 rpm? Round to 2 decimal places.

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