Question

There are 3 bells that ring at an internal of 15, 20 and 30 minutes respectively. If the 3 bells ring together at 11 am, at what time will the bells ring together again ?

Answer 1

12:05 pm

Step-by-step explanation:

15+20+30=65

11:00+65 minutes = 12 : 05

Answer 2

Hence, the bells will ring together after 60 minutes. ∵ All the bells were ring at 11.00 a.m. ∴ At 12 noon, all the bells will ring together.