Tere are four bells which toll at intervals of 3,7,12and 14seconds respectively. The four bells beginto toll at 12'o clock.When will they next toll together and how often they do so in 14 minutes?
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take lcm of 3,7,12 &14
lcm =84 seconds or 1 minute 24 seconds
the balls will toll together at 12:01:24
nd in 14 minutes they will toll =14×60/84
=10 times
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