Question

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

Answer 1

Answer:

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1:00 pn

Step-by-step explanation:

hjebrjndhdu

Answer 2

Answer:time they will next flash together2:30AM

Step-by-step explanation:

1) The problem is asking for the time that the two lighthouses will flash together again.

Given:

1 flashes at 15 minutes and 18 minutes

1 AM

L .C. M: (Listing Method)

15 - 15, 30, 45, 60, 75, 90, 105

18 - 18, 36, 54, 72, 90, 108

The L .C. M is 90 so they will flash together after 90 minutes or 1 hour and 30 minutes.

2:30 AM

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