Question

Four bell rings at the interval of 4, 7, 12 and 84 seconds respectively. If they start ringing together at 7 o’clock , when will they ring together ?​
Explain step by step!!​

Answer 1

Explanation:

Four bell rings at the interval of 4, 7, 12 and 84 seconds respectively.

LCM of 4, 7, 12 and 84 = 84

Now 84 seconds = 1 minutes 24 seconds

The bells ringed together at 7 o’clock

Now, They will ring after 84 seconds or 1 minutes 24 seconds at

07 hours 01 minutes 24 seconds

Answer 2

Answer:

.........7:01::24

7oclock + 1min 24sec or 84 sec

because all numbers have common factor ie 84