Question

Iron rims are heated red hot before planting on cart wheel why ?​

Answer 1

$\huge\underline\mathtt\red{Answer}$

When the iron rim is heated red hot, its size becomes greater than that of wheel and it easily slips on the wheel. When the rim is allowed to cool, it returns to its original size and fits firmly on the wheel.

Hope it helps you.....

Answer 2

Answer:

When the iron rim is heated red hot, its size becomes greater than that of wheel and it easily slips on the wheel. ... When the rim is allowed to cool, it returns to its original size and fits firmly on the wheel.