Frantic but functional, Mumbai is India’s economic powerhouse. Located on the country's west coast, it's home to about 21 million people living in the fast lane. CNBC's Tom Chitty explores the nation's most populous city on the first stop of his journey through India. ----- Subscribe to us on YouTube: http://cnb.cx/2wuoARM Subscribe to CNBC Life on YouTube: http://cnb.cx/2wAkfMv Like our Facebook page: https://www.facebook.com/cnbcinternational Follow us on Instagram: https://www.instagram.com/cnbcinternational/ Follow us on Twitter: https://twitter.com/CNBCi