Bella got up at 8:10. It took 10 minutes to wash and 30 minutes to eat breakfast. At this moment, she began to read. After reading, she went out. She went out at 9:45. How long did she read? 
Overseas Competition->Knowledge Point->Combinatorics->Time Problem->Time Calculation
$$8:10$$+$$10$$min+$$30$$min+reading=$$9:45$$  reading=$$25$$min 