Question

five bells beginning together toll at interval of 4s 5s 7s 8s and 10s respectively,. after what interval of time will they toll again together ?​

Answer 1

Answer:

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.

Answer 2

Solution(By Examveda Team)

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. So they will be in phase after 280 seconds.

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