Bus A and Bus B leave the bus depot at 7 am. Bus A takes 30 minutes to complete its route once and bus B takes 50 minutes to complete

Question

Bus A and Bus B leave the bus depot at 7 am.
Bus A takes 30 minutes to complete its route once and bus B takes 50 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.

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Kim Cúc 2 months 2021-07-30T18:27:02+00:00 2 Answers 1 views 0

Answers ( )

    0
    2021-07-30T18:28:10+00:00

    Answer:

    they never get back together bus b is always behind

    Step-by-step explanation:

    0
    2021-07-30T18:28:52+00:00

    Answer:

    9:30 am

    Step-by-step explanation:

    We can make a chart and keep filling it in until we see the same time in both columns.

    Bus A          Bus B

    7:00             7:00

    7:30             7:50

    8:00            8:40

    8:30           9:30

    9:00            10:20

    9:30

    Answer: 9:30 am

    We can also use the least common multiple of 30 and 50.

    We need to find the smallest number that is a multiple of both 30 and 50.

    30 = 2 * 3 * 5

    50 = 2 * 5^2

    LCD = 2 * 3 * 5^2 = 150

    The first time the buses will be at the depot together after 7:00 am is 150 minutes later. 150 minutes = 2 hours 30 minutes.

    7:00 am + 2 hours and 30 minutes = 9:30 am

    Answer: 9:30 am

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