A aluminum bar 3 feet long weighs 12 pounds. What is the weight of a similar bar that is 3 feet 4 inches long?

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# A aluminum bar 3 feet long weighs 12 pounds. What is the weight of a similar bar that is 3

A aluminum bar 3 feet long weighs 12 pounds. What is the weight of a similar bar that is 3 feet 4 inches long?