Question

a small gap is left between the iron rails of railway tracks why

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Answer 1

The small gap is left between the iron nails of railway tract to balance the train and stop it from getting falled

Answer 2

a gap is left so that during summer when then iron starts to heat up it spreads. This may lead to the slipping of the train. Therefore all the railway tracks have gaps between them to avoid slipping during any season.

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