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A supertrain of proper length 185 m travels at a speed of 0.89c as it passes through a tunnel having proper length 90.0 m. How

A supertrain of proper length 185 m travels at a speed of 0.89c as it passes through a tunnel having proper length

90.0 m. How much longer is the tunnel than the train or vice versa as seen by an observer at rest with respect to the tunnel?

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