a light flashes every 2 minutes, a second light flashes every 3.5 minutes and a third light flashes every 4 minutes. if all thre

Question

marishachu [46]

3 years ago

5

a light flashes every 2 minutes, a second light flashes every 3.5 minutes and a third light flashes every 4 minutes. if all thre

e lights flash together at 8 p.m what us the next time of the day they will all flash together

Mathematics

1 answer:

scoray [572] · Answer 1 · 2022-03-23T16:27:23+03:00

scoray [572]3 years ago

4 0

Take the LCM of the three numbers. Since 2 is a multiple of 4, you can ignore the two and just take the LCM of 4 and 3.5. Since 3.5 is a decimal, the LCM is just 3.5*4 which is 14. That is how many minutes after 8:00 they will flash together again.<span />