Question

why are gaps let's between legs of railway tracks

Answer 1

During summer the tracks expand due to heat and hence go out of shape. ... To allow for the expansion, gaps are left between lengths of railway tracks

Answer 2

Railway line are always made up of Metals.

As,we know solids expand due to heat.

So when a train passes through there it make the bars hot due to which they expand.

Thats why gaps are left between the legs of Railway Tracks.

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