math
posted by cindy .
There is a bus stop in front of Luann's house.A bus arrives at the stop every 45 minutes and goes into fown.The first bus comes at 7:15am If the bus trip takes 12 minutes, what is the latest bus Luann can take in order to get to town by 1:00pm ?

a tourist bus leaves richmond at 1:00pm for new york city. exactly 24 minutes later, a truck sets from the same direction. the tourist bus moves at a steady 60 km/h. the truck travels at 80 km/h. how long does it take the truck to overtake the tourist bus