Sagot :
Answer:
At 1:00 a.m. is the time the two lighthouses will flash together.
Answer:
the answer is 1 a.m
Step-by-step explanation:
if the first lighthouse flashes every 30 minutes and the other flashes every 1 hour, therefore, the first lighthouse will flash at 12:30 am and of course it will flash again in 1 am because it flashes every 30 minutes.