Asked by Hans

lighthouse 1 flashes its light every 15 minutes. Lighthouse 2 flashes every 18 minutes. If the two lighthouses flash together at 1:00 A.M, what time they will next flash together?

4 years ago

Answered by oobleck

LCM(15,18) = 90
so what time is 90 minutes after 1:00 ?

4 years ago

Answered by Adrian

Pano to sagutan with solution

3 years ago

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