Question

four bells toll at intervals of 3, 5, 7 and 10 seconds respectively if they begin tolling together when will they toll again and how many times will they together in an hour

Answer 1

Answer:

1. 210 seconds

2. 17 times

Step-by-step explanation:

First Question : If they begin tolling together, when will they toll again?

Their L.C.M is 3 × 7 × 10 = 210 so they will toll again after 210 seconds.

First answer is 210 seconds.

Second Question : How many times will they together in an hour?

1 hour is equal to 60 minutes.

And 60 minutes is equal to 3600 seconds.

3600 ÷ 210 = 17 ... 30

They toll 17 times together.

Second answer is 17 times.

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Answer 2

Answer:210 seconds later they will toll together..

In 1 hour they will toll 17 times