The tour of the space museum started at 10:45. It lasted for 1hour 30 minutes. What time did the tour end?

12:15

Step-by-step explanation:

1.) add one hour to 10:45 to get 11:45

2.) then add half 30 minuets to 11:45 to get twelve or you could add half of 30 minuets (15 mins) to get 12:00 and then add the remaining 15 minuets to get 12:15