Question

1. An iron rim of a slightly smaller diameter
than a wooden wheel is cooled so that it
easily slips over wooden wheel. heated
2. Small gaps are provided between the railway
lines to provide for easy transportation and
laying of railway lines.
3. New electric wires for power transmission
are fixed tightly, if laid during summer. This
prevents wires from snapping in winter.
Write the correct statement​

Answer 1

Explanation:

2. because iron expands in the summer