Question

three bells ring at an interval of 10 15 and 20 minutes respectively if they all ring together at 600 a.m. at what time will they ring together​

Answer 1

7a.m.

Explanation:

10 - 10, 20, 30, 40, 50, 60

15 - 15, 30, 45, 60

20 - 20, 40, 60

All three bells will ring together after 60 minutes which means at 7 a.m.

Answer 2

Answer:At 7 am

Step-by-step explanation:

Bell a will ring at : 6:10 6:20 6:30 6:40 6:50 7:00

Bell b will ring at : 6:15 6:30 6:45 7:00

Bell c will ring at : 6:20 6:40 7:00

So bell will ring together gagain at 7am