High School

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A red light Flashes every 28 seconds.

A green light Flashes every 24 seconds.

They both Flash at the same time.

After how many seconds will they next both Flash at the same time?

Answer :

Answer:

2 min and 8 sec

Step-by-step explanation:

LCM (28 , 24) = 186

The red and green light will flash together after every 168 seconds.

Time =168 / 60 MIN

Time = 2 minutes and 8 seconds

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Rewritten by : Barada

Answer:

Hi,

[tex]LCM(28,24)=LCM(2^2*7,2^3*3)=2^3*3*7=168\ (s) \ or\ 2\min\ 48\ s[/tex]

Step-by-step explanation: