Julie read 3 books in 2 h 42 min. She took the same amount of time to read each of the first 2 books. She took 30 min longer to read the third book than each of the first 2 books. She finished reading all the books at 15 41. What time did she start reading the third book?
Duration that Julie took to read the first book = 1 u
Duration that Julie took to read the second book = 1 u
Duration that Julie took to read the third book = 1 u + 30 min

Total duration that Julie took to read the three books 
= 1 u + 1 u + 1 u + 30 min
= 3 u + 30 min

3 u + 30 min = 2 h 42 min
3 u = 162 min - 30 min
3 u = 132 min  

1 u = 132 min ÷ 3 = 44 min

Duration that Julie took to read the third book
= 44 min + 30 min
= 74 min
= 1 h 14 min

1 h 14 min before 15 41: 14 27

Time that Julie started to read the third book = 14 27

Answer(s): 14 27