Question

the traffic light at three different road Crossings change after every 48 second, 72 second and 108 seconds respectively .if they all change Simultaneously at 8:00 a.m. then at what time will they again change simultaneously?​

Answer 1

Answer:

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Step-by-step explanation:

L.C.M of 48, 72, 108 = 2 x 2 x 2 x 2 x 3 x 3 x 3 = 432 sec.

After 432 seconds, the lights change simultaneously.

432 second = 7 minutes 12 seconds

Therefore the time = 7 a.m. + 7 minutes 12 seconds

= 7:07:12 a.m.

Answer 2

Answer:

I think first will change at 8:48

secind at 9:12

and third at 9:48

THANKYOU.