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A room has dimensions 3mxx4mxx5m. A fly ...

A room has dimensions `3mxx4mxx5m`. A fly starting at one corner ends up at the diamertrically opposite corner. The magnitude of the displacement of the fly is

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When the fly was to walk, then shortest distance travelled is `=3+sqrt(4^(2)+5^(2))=3+sqrt41=9.4m`
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