Answer: 114.31 nautical miles per day.
Step-by-step explanation:
Since, according to the question, .The distance from the Spice Islands to Lisbon is 11431 nautical miles.
Therefore, total distance = 11431 nautical miles.
And, it took Magellan and his crew 100 days to reach Lisbon.
Thus, total times taken by Magellan = 100 days
Thus, Magellan’s rate of travel per day= total distance traveled by him/ total time taken by him= 11431/100= 114.31 nautical miles per day.