Question

Three bells ring at regular intervals of 20mins , 36mins, ,48mins respectively. At what time will they ring together again next , if they start simultaneously at 12noon ?​

Answer 1

Step-by-step explanation:

So let's find the PCM of these 3, and that is 60mins. So 60 minutes after 12 o'clock, all 3 bells will ring together again, ie at 1 o'clock. So, after ringing together at 12 o'clock, the bells will again ring together at 1 o'clock. They will ring together next at 1 o'clock