Question

the traffic lights at three different road crossing changes after every 48 seconds,72 seconds and 108 seconds respectively.They change simultaneously at 8 am.What time will they change simultaneously again?​

Answer 1

Answer:

Changing of traffic light at three different road=1st road=48 seconds 2nd road=72 seconds 3rd road=108 seconds

LCM of 48, 72 & 108=2*2*3*2*2*3*3 =432 seconds 432=432/60 minutes =7 minutes 12 seconds.

They will change simultaneously at 8:00 a.m + 7 minutes 12 seconds= 08:07:12 A.M.

They will change simultaneously at 08:07:12 A.M.

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Answer 2

Answer:

they will change after every 48+72+108 second

Step-by-step explanation:

So 48+72+108=228 sec