Ask Question
13 February, 05:46

Two lighthouse

can be seen from the top of the hill the first flashes once every six seconds and the other flashes every once every 15 seconds is the flash how long is it until the first again at the same time

+4
Answers (2)
  1. 13 February, 05:53
    0
    30 seconds.

    Step-by-step explanation:

    This will be equal to the lowest common multiple of 6 and 15.

    6 = 2 * 3

    15 = 3 * 5

    The LCM = 2*3*5 = 30.

    Answer : 30 seconds.
  2. 13 February, 06:05
    0
    30 seconds

    Step-by-step explanation:

    suppose they flash together the first time at time t1

    they will flash together again on the first multiple of t1 that is common to the two lighthouses which is 30

    15*2=30

    6*5 = 30
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “Two lighthouse can be seen from the top of the hill the first flashes once every six seconds and the other flashes every once every 15 ...” in 📗 Mathematics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers