Question

four bells toll at interval of 4,7,12and 84 seconds, the bell toll together at 5o'clock, when will they again toll together. ​

Answer 1

Step-by-step explanation:

pls refer the attachment

hence they will ring at 5:01:24 means (1min24secpast 5o clock

Answer 2

Given, 4 bells ring at intervals of 4s, 7s, 12s and 84s respectively.

It is given that they ring simultaneously at 5.00.

So, the next time of there simultaneous ring can be find out by taking the LCM of 4s, 7s, 12s and 84s as:

So, the LCM of 4s, 7s, 12s and 84s = 2 × 2 × 3 × 7 = 84

Hence, the bells will toll together after 84 seconds, i.e., at the time 5 : 01 : 24.

Now, in 84 seconds all the bells will toll together = 1 times

So, in 28 minutes (= 28 × 60 s = 1680 s) all the bells will together =