3 bells ring at an interval of 4, 7 and 14 minutes. All three bell rang at 6am, when the three balls will the ring together next?
Given that, 3 bells ring at an interval of 4, 7 and 14 minutes.
To find the time interval at which they rang again we have to find L.C.M of three time intervals.Let us find the L.C.M of 4, 7 and 14.4=2×27=7×114=2×7LCM(4,7,14)=2×2×7=28Therefore, all the three balls will ring together again at 6:28am.
Four bells ring at intervals of 3,7,12 and 14 minutes respectively. All four ring together at 12 noon. When will they ring together again.