Question

The bells begin tolling at the same time and continued to do so at intervals of 21, 28, 30 seconds respectively the bells will toll together again after

Answer 1

Answer:

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we will have to find the LCM of the given numbers

the LCM of the given numbers 21, 28 and 30 is

=420

it means the bells will ring together after 420 seconds or 7 minutes.

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Answer 2

Answer:

420

Step-by-step explanation:

LCM of 21 28 and 30 is 420

therefore 420 sec is the answer

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