Question

Four bells toll in a tower at interval of
5,7, 3 and 12 seconds respectively. If all
of them toll at 5 am, the next time they
will toll together is :
(1) 5.10 am
(3) 5.07 am
(2) 5.15 am
(4) 5.08 am​

Answer 1

Answer:

5:07 am

Step-by-step explanation:

All bells toll in multiples of their respective interval.

So we need to take out the LCM.

LCM(5,7,3,12)=420seconds=420/60minute=7minutes

They tolled together at 5am.

So next tolling after 7 minutes, that is, at 5:07am.