Question

Bus A and Bus B leave the bus depot at 9 am. Bus A takes 30 minutes to complete its route once and bus B takes 40 minutes to complete its route once. If both buses continue to repeat their route, at what time will they be back at the bus depot together? Assume the buses have no breaks in between routes. Give your answer as a 12-hour clock time

Answer 1

Answer:

Step-by-step explanation:

bus A takes 30 minutes to complete its route

Bus B takes 40 minutes to complete it's route

30 +40=70

therefore the buses meet each other in every 70 minutes

Answer 2

Answer:

11 am

Step-by-step explanation:

For the sake convenience, lets take the LCM of 30 and 40

LCM (30, 40) = 120

So, it will take 120 minutes to reach the depot together.

120 minutes = 2 hours.

The starting time is 9 am. Then the time both buses back at the bus depot is 9 + 2 = 11 am