Question

there is a proverb: 'carring coal to new castle'.explain what does it mean?

Answer 1

The proverb 'Carrying coal to Newcastle' means a futile effort. Historically speaking the saying originated about the geologically rich in coal area, Newcastle, which since the Middle ages was one of the largest exporters of coal, so much so that most of the economy of the region depended upon it. Hence carrying coal to Newcastle would be a futile, foolhardy thing, as there was plenty there already.