3 bells in a temple ring after an interval of 42, 56, 77 seconds. They all ring together at 6 am. After how many minutes they ring again toghter?
1
(30 + 3/5) minutes
2
(30 + 4/5) minutes
3
(30 + 21/30) minutes
4
(30 + 23/30) minutes
3 bells in a temple ring after an interval of 42, 56, 77 seconds. They all ring together at 6 am. After how many minutes they ring again toghter?