Where is the city Delhi?

Question

The iron pillar of Delhi, India, a 7.21 m (23.7 ft) high pillar that is 98% pure wrought iron, has withstood corrosion in the open air for how long?

Answer 1

India

Delhi, India’s capital territory, is a massive metropolitan area in the country’s north. It is bordered by Haryana on three sides and by Uttar Pradesh to the east. Delhi also known as NCT covers an area of 1,484 square kilometres (573 sq mi). According to the 2011 census, Delhi's city proper population was over 11 million, the second-highest in India after Mumbai.