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It takes 167 tennis rackets to weigh as much as one kangaroo. Piled up, this heap is about the size of a refrigerator.

To weigh as much as a kangaroo
about 167 tennis rackets
110 lb (50 kg) each side
about the size of a refrigerator
Size and weight estimated by AI from typical values. Sizes and weights are typical for an adult or standard tennis racket; real ones vary.