Question

Bus A and Bus B leave the bus depot at 7 am.
Bus A takes 30 minutes to do its route and bus B takes 50 minutes to complete its route.
At what time are they both back at the bus depot together?
Give your answer as a 12-hour clock time.

Answer 1

Answer:

9:30 am

Step-by-step explanation:

30=3*10

    =3*5*2

50=5*10

    =5*5*2

    =(5^2) * 2

LCM(30,50) = 5*3*2*5

                     =25*6

                     =150 minutes

150 minutes=150/60 hours

                     =2.5 hours

They both will be back at =7 + 2.5

                                            =9.5

                                            9:30 am

Answer 2

Answer:

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Step-by-step explanation:

Bus B completes the route at 7:50, 8:40,9:30, 10:20,11:10,12:00,12:50,1:40,2:30,3:20,4:10,5:00, 5:50,6:40. Bus A and Bus B return together to depot at 12:00 p.m. and 5:00 p.m.