Five bells ring at intervals of 4, 5, 7, 8 and 10 seconds respectively. After what interval of time will they ring again together?
Solution (By Examveda Team)
ANSWER: 280, 560, 840, 1120 seconds(Multiple of 280)SOLUTION:
They will be ring together at a time which is a multiple of 4, 5, 7, 8, 10.
A number which is multiple of 4, 5, 7, 8, 10 is the multiple of their L.C.M.
L.C.M. of 4, 5, 7, 8, 10 = 280
So they will be in phase after 280 seconds.
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