Question

Three bells toll at intervals of 9. 12. 15 minutes. If they start tolling together after what time
will they next toll together?​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

after 180 minutes ( which is after 3 hours )

step by step explanation:

9=3^2

12=3 * 2^2

15=3 * 5

Therefore, the LCM=2^2 * 3^2 * 5 =4 * 9 * 5

                                                        =180 mins

1 minute=1/60 hours

so 180 minutes=180/60 hours

                         =3 hours