Question

Three bells ring at intervals of 20 minutes, 30 minutes, and 45 minutes
respectively. After how much time will the bells ring together?

Answer 1

Answer:

180 minutes or 3 Hours

Step-by-step explanation:

The time when the bells ring together will be the L.C.M. of the time intervals.

So,

L.C.M.(20,30,45) =  180

∴ After 108 minutes (3hours) the bells will ring together.