Question

pls pls pls answer this and don't post any spam as it is very urgent. Who will give the correct answer, he/she will be marked as brainlist.. The problem reads as follows: "On the coast there are three lighthouses. The first light shines for 3 seconds, then is off for 3 seconds. The second light shines for 4 seconds, then is off for 4 seconds. The third light shines for 5 seconds, then is off for 5 seconds. All three lights have just come on together. 1) When is the first time all three lights will be off at the same time? 2) When is the next time all three lights will come on together at the same moment?" pls answer it And pls follow me.....

Answer 1

Answer:

1) They will off together after 60sec = 1min.

2) They will on together again after 120sec=2min.

thanks

Answer 2

Answer:

1. after 5 second

2. after 120 second

guys seriously this question which is answered by (mana) in this she or he has made wrong in part one in this question..