You take the bus to work and need to arrive by 9:00 AM. The trip takes 25 minutes. It takes you 10 minutes to get to the bus stop from home and 10 minutes to get to work from the bus stop. If busses leave the bus stop at the following times, which is the last bus you can take to get to work on time?
The total time it takes for you to get to work by bus is:
10 minutes to get to the bus stop + 25 minutes on the bus + 10 minutes to get to work = 45 minutes
You need to arrive at work by 9:00 AM, so the latest bus you can take is:
9:00 AM - 45 minutes = 8:15 AM
Therefore, the last bus you can take is the one that leaves the bus stop at 8:15 AM.