Question: Using the appropriate material index, when the function is a thin-walled panel, the constraint is stiffness, and the objective is to minimize mass, what

Using the appropriate material index, when the function is a thin-walled panel, the constraint is stiffness, and the objective is to minimize mass, what is the mass of an aluminum panel relative to a steel panel? Choices: 0.49 1.22 0.78

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