The garbage man comes every Tuesday. Cherry street has 20 houses, and each house has one trash can. When the trash cans are already on the side of the road, the garbage man can pick up all cans in 15 minutes. -The city wants to bring in new technology that can cans from both sides of the street in one go. Julie usually takes her garbage cans out as soon as she hears the garbage truck at the first house. How much time would Julie have to take her trash out if the city uses this new system?