Question

three traffic lights change after 20 min, 24 min and 30 min. If they change together at 9 :30 am find the time they will change together again​

Answer 1

Answer:

11:30 am

Step-by-step explanation:

change together means you have to find lcm of 3 numbers

120min

in hours 120/60

2hrs

so after 2 hours means 11:30 am

hope so you got it