anonymous
  • anonymous
Four bells first begin to toll together and then at intervals of 6, 7, 8 and 9 seconds respectively. Find how many times the bells toll together in two hours and at what intervals they toll together?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
First find L.C.M of 6,7,8 and9
anonymous
  • anonymous
ok. 504.
anonymous
  • anonymous
Are u sure

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anonymous
  • anonymous
ya... thats right
anonymous
  • anonymous
So, the four bells will ring afer 540 seconds all together
anonymous
  • anonymous
got it?
anonymous
  • anonymous
504.
anonymous
  • anonymous
now, 2 hour = ---- seconds
anonymous
  • anonymous
But it says they ring together at intervals of 6, 7, 8, 9 seconds.
anonymous
  • anonymous
So what have these numbers got to do with 504?
anonymous
  • anonymous
Since the Four bells first begin to toll together and then at intervals of 6, 7, 8 and 9 seconds respectively
anonymous
  • anonymous
they will ring together after 540 seconds now
anonymous
  • anonymous
PLZ read the question carefully
anonymous
  • anonymous
So after that nine seconds, they will ring together after 504 seconds?
anonymous
  • anonymous
nope.....
anonymous
  • anonymous
Lets say they ring together first at 6.00.00. Then at 6.00.06 6.00.07 6.00.08 6.00.09 right?
anonymous
  • anonymous
nope.....
anonymous
  • anonymous
Let me first expalin the question
anonymous
  • anonymous
there are four bells|dw:1344785837617:dw|
anonymous
  • anonymous
which ring together at first
anonymous
  • anonymous
then BELL A rings after 6 seconds, BELL B rings after 7 seconds , BELL C rings after 8 seconds and BELL D rings after 9 seconds
anonymous
  • anonymous
got it?
anonymous
  • anonymous
yep i got it now.
anonymous
  • anonymous
so what do u think 540seconds means
anonymous
  • anonymous
2 hours = 2 * 60 * 60 seconds = 3600 * 2 = 7200 seconds
anonymous
  • anonymous
The three bells will ring TOGETHER every 504 seconds right?
anonymous
  • anonymous
right
anonymous
  • anonymous
OK, I know how to do it now. Thanks!!
anonymous
  • anonymous
WELCOMX

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