Question

Three bells ring at an interval of 5 , 7 and 10 minutes. All the bells ring at 4 pm. When the bells will ring together again ?​

Answer 1

Answer:

5:10 p.m.

Step-by-step explanation:

LCM of 5, 7 and 10 = 70

The bells will ring together after 70 minutes = 1 hour 10 minutes

4:00 + 1:10 = 5:10

Hence, the bells will ring together at 5:10 pm.

Answer 2

Answer:

The three bells again ring together on that time which

is the LCM of individual time of each bell

5 = 5×5

7 = 7×1

10 = 2×5

LCM = 5×5 = 25

The 3 bells will ring together again at 4:25