Three bells toll at intervals of 20 seconds, 30 seconds and 40 seconds respectively. If they toll together at 6 am, then which of the following is the time at which they can toll together ?

Three bells toll at intervals of 12 min, 24 min and 9 min respectively. If they toll togather at 11.00 a.m. then find the time at whcih they toll togather again for the first time. The Following are the steps involved in solving the above problem. Arrange them in the sequential order. (A) We know that the three bells toll togather at the multiples of LCM of 12 min, 24 min and 9 min. (B) After 11 a.m. they toll togather at (11 a.m.+ 72 min ) i.e., 12.12 p.m. (C) THe LCM of 12, 24 and 9 is 72. (D) Therefore, all the three bells toll togather for every 72 min.

Three bells toll at intervals of 8, 12 and 15 minutes respectively. If they start tolling together, after what time will they toll together again

Three bells, toll at interval of 36 sec, 40 sec and 48 sec respectively. They start ringing together at particular time. They next toll together after: