Sagot :
Answer:
Bell A rings every 7 minutes
Bell B rings every 6 minutes
Bell A and B rings together at 8:05p.m.
Question: When will they ring together again?
first, find the LCM of 7 and 6
7 - 7, 14, 21, 28, 35, 42, 49
6 - 6, 12, 18, 24, 30, 36, 42, 48
The LCM of 7 and 6 is 42
Therefore, Bell A and Bell B will ring together again in 42 minutes or 8:47p.m