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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
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First find L.C.M of 6,7,8 and9
ok. 504.
Are u sure

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Other answers:

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

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