Question

Six bells begin to toll together at the interval of 10s, 15s, 20s, 25s, 30s, 35s respectively, then how many times will they toll together in the span of 7h ?
(a) 12
(b)10
(c)8
(d)6​

Answer 1

Answer:

The least common multiple (LCM) of 2, 4, 6, 8, 10, and 12 is 120. Thus, the bells toll together every 120 seconds (or 2 minutes), so in 30 minutes they will toll simultaneously 30/2 = 15 times.

Step-by-step explanation:

hope it will help you

Answer 2

Answer:

they toll together in the span of 7hrs is 5times