Question

Bus no. A1 arrives at the bus stop every 15 minutes, bus no. A2 arrives at the bus stop every 20 minutes and bus no. A3 arrives at the bus stop every 1 hour. If three buses arrived at the bus stop at 9:45 a.m. At what time will they arrive together simultaneously again?

Answer 1

Answer:

10.45am

Step-by-step explanation:

A1=15min

A2=20min

A3=1hr=60min

find lcm to get answer

15=3*5

20=2*2*5

60=2*2*3*5

lcm=3*2*2*5=60min

therefore they arrive together again at 9.45+60min(1hr)=10.45am