How long would it take for someone to travel by boat from London, England to Bombay, India in the 17th century? How many miles would that journey be?
This sea distance calculator:
Gives the distance via Cape of Good Hope as 10702 nautical miles.
If your 17th century ship could maintain an average speed of 5 knots (which might be optimistic) the voyage would take 89 days.
This site:
http://archiver.rootsweb.ancestry.com/th/read/INDIA/2010-06/1276386066
claims that actual voyage times were 90-100 days. So, somewhat slower than 5 knots average, but not much slower.