she finishes music at 9:05 and finishes painting at 9:25.
Explanation:
If you add 35 minutes to 8:30 you get 9:05 and that's when her music lesson is over so you would add 20 minutes to 9:05 and you would get 9:25 which is when she finishes painting.
If it lasts for 35 minutes that means she finishes her music class at 9:05 a.m. (8:30 + 35 minutes = 9:05)
If she then paints for 20 minutes after her music class, she will start painting at 9:05 a.m. and she will finish her painting at 9:25 a.m. (9:05 + 20 = 9:25)
