Answer: About 10.95 nautical miles
Step-by-step explanation: First, lets find how many minutes the cruise ship can cover in 1 nautical mile.
In order to do that divide 21 nautical miles by 21 and 483 minutes by 21.
21/21 = 1 nautical mile 483/21 = 21 minutes
Now, divide 230 minutes by 21 minutes, which equals about 10.95.
So, in 230 minutes the cruise ship will travel about 10.95 nautical miles.