Question

the U
5 bells toll at regular intervals of 10, 15, 20,25,
30 seconds respectively. If they toll together

at s Am. Then at what time will they
to together for the first time after 8Am.​

Answer 1

Answer:

Time of 1st bell = 10 sec = 2*5

Time of 2nd bell = 15 sec = 5*3

Time of 3rd bell = 20 sec = 2*2*5

Time of 4th bell = 25 sec = 5*5

Time of 5th bell = 30 sec = 2*3*5

LCM of ringing of all five bell = 2*2*2*2*3*3*5*5 = 3600

= 3600/60*60 = 1 hr