Question

Why rails have gaps at specific distance?​

Answer 1

it is because during summer iron expands due to the heat in the atmosphere

if the rails have gaps then the iron trails will not face any problem but if they dont then there would be problem for the trains to travel on them

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Answer 2

Answer:

When railway tracks are laid the engineers leave a small gap between two rails. All metals expand when heated. ... However, since each section of the rail is very long, the expansion due to heating is significant, and unless space is provided for expansion of rails, the rails will bend to accommodate the increased length.