Three different bells ring together at 10:00 a.m. Then the bells ring at intens
of 15, 25 and 30 minutes, respectively. When will the three bells ring together
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2
Answer:
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Answered by
2
Answer:
11:50 am
Step-by-step explanation:
the first bell will ring after every 15 mins, i.e. at every multiple of 15, 15 mins, 30 mins, 45 mins, etc.
the second bell will ring after every 25 mins, i.e. at every multiple of 25, 25 mins, 50 mins, 75 mins, etc.
the third bell will ring after every 30 mins, i.e. at every multiple of 30, 30 mins, 60 mins, 90 mins, etc.
this means that we have to find a number which is a multiple of 15, 25 and 30... thus we need to find the LCM of those numbers.
to their LCM is 150 mins... this means that the bells will ring together again 150 mins after 10 am, which is 10 mins to 12 or 11:50 am
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