Gwen read 3 books in 2 h 17 min. She took the same amount of time to read each of the first 2 books. She took 41 min longer to read the third book than each of the first 2 books. She finished reading all the books at 22 10. What time did she start reading the third book?
Duration that Gwen took to read the first book = 1 u
Duration that Gwen took to read the second book = 1 u
Duration that Gwen took to read the third book = 1 u + 41 min

Total duration that Gwen took to read the three books 
= 1 u + 1 u + 1 u + 41 min
= 3 u + 41 min

3 u + 41 min = 2 h 17 min
3 u = 137 min - 41 min
3 u = 96 min  

1 u = 96 min ÷ 3 = 32 min

Duration that Gwen took to read the third book
= 32 min + 41 min
= 73 min
= 1 h 13 min

1 h 13 min before 22 10: 20 57

Time that Gwen started to read the third book = 20 57

Answer(s): 20 57