-
Three bells ring at intervals of 36 seconds, 40 seconds and 48 seconds respectively. They start ringing together at a particular time. They will ring together after every
-
- 6 minutes
- 12 minutes
- 18 minutes
- 24 minutes
Correct Option: B
Required answer = LCM of 36, 40 and 48 seconds
= 720 seconds
| Required answer = | minutes = 12 minutes | 60 |
∴ LCM = 2 × 2 × 2 × 2 × 3 × 3 × 5 = 720
