Question

In school, the duration of a period in junior section is 40 min and that in senior section is 1 hour. If the first bell for each section rings 9:00 am, then when will two bells ring together again?

Answer 1

Answer:

Step-by-step explanation:

Hey there, 

We know that In a school the duration of a period in junior section is 40 minutes and in senior section is 1 hour .

To solve the problem we have to find the least common multiple of 40 mins and 1 hr (60 min) 

The least common multiple of 40 , 60 is 120

2³⋅3^1⋅5^1=120

Answer 2

at 11 am they will ring together.