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    Sound waves travelling in air and solid

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    A man strikes a long aluminum rod at one end. Another man at the other end with his ear close to the rod, hears the sound of the blow twice (once through the air and once through the rod), with a 332 ms interval between them. How long is the rod?

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    This problem involves the sound wave prorogation in air and a solid. I have provided step by step solution to the this problem.