Question

Three traffic signal glow at intervals of 5,10 and 15 minutes. When will they glow together

Answer 1

Answer:

30

Step-by-step explanation:

Given  

Three traffic signal glow at intervals of 5,10 and 15 minutes. When will they glow together

 Given three traffic signals glow at intervals of 5, 10 and 15 minutes. So to glow together we need to find the LCM of the given numbers.

So LCM of 5,10 and 15

 5       5  10   15

  2       1    2     3

  3       1     1     3

            1      1     1

So LCM will be 5 x 1 x 2 x 3 = 30

So together they will glow at 30 min

Answer 2

Answer:

Step-by-step explanation:

30