Question

three bells are ringing continuously at intervals of 49 56 and 48 minutes respectively. at what time will they ring together again if they ring simultaneously at 9 a.m

Answer 1

Answer:

find the least common multiple of 30,36 and 45

3 |30,36,45

5 |10,12,15

3 |2,12,3

2 |2,4,1

2 |1,2,1

|1,1,1 So L.C.M. of 30,36 and 45 is 3×5×3×2÷2=180.

So after 180 minutes they ring together Therefore they all ring together at 11:00 a.m.

Answer 2

The bells will ring after 9:39 am.

Step-by-step explanation:

Since we have given that

Intervals are 49 seconds, 56 seconds, 48 seconds

So, They will ring together again in the duration of

LCM of 49, 56 and 48

= 2352 seconds

= 39.2 minutes

So, the bells will ring after 9:39 am.

# learn more:

Iv) three bells are ringing continuously at intervals of 40,56 and 48 minutes respectively .At what time will they ring together again if they ring simultaneously at 9

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