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Four bells toll at an interval of 8,12,15 and 18 seconds respectively. All the four bells begin to toll together. How many will they toll together in one hour excluding the one at the start?
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Oct 26, 2019
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Four bells toll at an interval of 8,12,15 and 18 seconds respectively. All the four bells begin to toll together. How many will they toll together in one hour excluding the one at the start?
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Alexey Ivanov
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the nest time they toll together is given by the LCM of 8,12,15 and 18
8= 2*2*2
12=2*2*3
15 = 3*5
18=2*3*3
LCM = 2*2*2*3*3*5 = 360
so they will toll together every 360 seconds
So in hour hour they will toll 3600/360 = 10 times Answer
Thomas Broyer
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Oct 27, 2019
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Sol . LCM of 8,12,15 and 18 = 360
So, after each 360 seconds zie. after each 6 minutes four bells will toll together so in
1 hour that in 60 minutes these four bell will toll together =
= 10 times
Iga
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Oct 30, 2019
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Iga
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