Why is a ring of iron blade heated before fixing it into the handle of a tool?
Why is the iron tyre heated before fitting it on a wooden wheel?
Chanakya on his way home saw a farmer digging the soil. He observed that the digging tool had an iron blade fixed to a wooden handle. He wondered how the iron blade was fixed to the wooden handle even though the iron ring is smaller than the wooden handle. How do you think this was achieved?