Question

lincoln street has 2 traffic signs signalS and signal B. signal A changes after every 90 seconds and signal B changes after every 60 seconds. signal changes together at 8:05 am. find the time when the 2 signals will change simultaneously again

Answer 1

Answer:

8:08 am

Step-by-step explanation:

signal A will be blinking at these times:

8:05:00

8:06:30

8:08:00

8:09:30

8:11:00

8:12:30

and so on

signal B will be blinking at:

8:05:00

8:06:00

8:07:00

8:08:00

8:09:00

8:10:00

8:11:00

8:12:00

8:13:00

The first common one is 8:05am as given in the question

next is 8:08am