Question

three colour lamps glow at intervals of 10,12 and 15 seconds. After what time, all three bulbs will glow together​

Answer 1

Answer:

take lcm of them

lcm of 15, 10 and 12 is 60

so they will glow together after 60 sec

Answer 2

Answer:

60 second

Step-by-step explanation:

hope you will be satisfied with this answer.