Three bells ring at interval of 36 seconds, 40 seconds and 48 seconds respectively. They start ringing together at a particular time. They will ring together after every
Show answer & explanation
Correct answer: B
Explanation
The correct option is 2.
Given that Three bells ring at interval of 36 seconds, 40 seconds and 48 seconds respectively
To find particular time after which they will ring together, we need to find L.C.M of 36, 40 & 48.
L.C.M of 36,40 & 48 is 720. Therefore three bells will ring together after every 720seconds i.e.., 12minutes.