Here is part of a bus timetable.
| Woolwich | 0717 | 0724 | 0732 | 0739 | 0746 |
| Woolwich Arsenal | 0719 | 0726 | 0734 | 0741 | 0748 |
| Plumstead Station | 0725 | 0732 | 0740 | 0747 | 0754 |
| Plumstead Corner | 0730 | 0737 | 0745 | 0752 | 0759 |
| Upper Wickham Lane | 0737 | 0744 | 0752 | 0759 | 0806 |
| Welling Corner | 0743 | 0750 | 0758 | 0805 | 0813 |
| Bexleyheath | 0754 | 0801 | 0809 | 0817 | 0825 |
| Crayford | 0803 | 0811 | 0819 | 0827 | 0835 |
| Dartford Station | 0814 | 0823 | 0831 | 0839 | 0847 |
| Darent Valley Hospital | 0824 | 0833 | 0841 | 0849 | 0857 |
| Bluewater | 0828 | 0837 | 0845 | 0853 | 0901 |
A bus leaves Woolwich at 0724, how many minutes does this bus take to reach Bluewater?
Jeff needs to get from Bexleyheath to Bluewater to start work at 9 am.
It takes Jeff 12 minutes to walk from his house to the bus stop in Bexleyheath.
It takes Jeff 8 minutes to walk from the bus station in Bluewater to his work.
What is the latest time Jeff can leave his house to get to work on time?
