Mathematics, 29.09.2020 14:01 andrew763

Stoplight A changes color every 15 seconds and Stoplight B changes color every 45 seconds. Both stoplights changed color 12 seconds ago. After how many seconds will the stoplights change color at the same time again?

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Stoplight A changes color every 15 seconds and Stoplight B changes color every 45 seconds. Both stop...