Asked by Saranya
A lighthouse has two lights - one that flashes every 2 minutes and another that flashes every 2.5 minutes . Suppose the lights flash together at noon. What is the first time after 3 PM when they will flash together again?
Answers
Answered by
R_scott
the LCM (least common multiple) of 2 and 2.5 is 10
so the lights flash together every 10 minutes
so the lights flash together every 10 minutes
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