Five bells beginning together toll at interval of 4s, 5s, 7s, 8s and 10 s, respectively. After what interval of time will they toll again together?
Answers
Answered by
0
Answer:
280
Step-by-step explanation:
you have to find the lcm of 4,5,7,8,10
which is 280
ez
Answered by
0
Correct option is A)
L. C. M. of 6,7,8,9=504
∴ The bells will start ringing after an interval of every 504 seconds.
Now 2 hours =2×60×60 seconds =7200 seconds
∴ Number of times the bell will ring in 2 hours =
504
7200
=14.2 times
Since the bells rang together at the start also therefore the bells will ring 14 times in 2 hours.
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