Question

Three bells A, B and C ring at interval of 3 hours, 4 hours and 5 hours respectively. After how many hours will the three bells first ring simultaneously (at the same time)?

Answer 1

Answer:

Therefore, after 120 seconds the three bells will ring together. ... to 6 p.m. in a clock if the minute and hour's hands are of the same length and ... In 120 seconds, the first bell would have rung 120/3=40 times.

Answer 2

Answer:

60 Hours

Step-by-step explanation:

You have to find the LCM (least common multiple

You can do this by either hand counting, or by multiplying each of the numbers and seeing if the other ones fit into your product evenly.

Anyway, once you have figured this out, you will have an answer of 60 hours.