TSA Original Paper 1 · Question 13 · Optimisation
SaveTrains run regularly between Millford and Parkside, stopping at Oakley, Newbridge and Hartwell, according to the following timetable. (see image) Rachel lives a 12-minute walk away from Oakley station. She needs to attend a meeting in Parkside that starts at 16:45. It will take her 8 minutes to walk from Parkside station to the meeting venue. Rachel wants to arrive at the meeting no more than 10 minutes early, but she must not be late.

What is the latest time Rachel should leave home?