The calculated distance (air line) between Kattivākkam and Gūduvāncheri is approximately 31 miles respectively 50 kilometers.
By car or train, the actual journey to Gūduvāncheri is certainly longer, as only the direct route (as the crow flies) between Kattivākkam and Gūduvāncheri has been calculated here.
Air line (approximately)
50 kilometers
27 nautical miles