five bells begin to toll together and toll respectively at intervals 6 5 7 10 and 12 second .how many times will they toll together in one hours excluding the one at the start
Answers
Answered by
4
Step-by-step explanation:
L.C.M. of 6, 5, 7, 10 and 12 is 420. So, the bells will toll together after every 420 seconds i.e. 7 minutes. Now, 7 x 8 = 56 and 7 x 9 = 63. Thus, in 1-hour (or 60 minutes), the bells will toll together 8 times, excluding the one at the start.
Similar questions