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Four bells toll after an interval of 16,45,60,75 seconds respectively.these bells begin to toll together at 9a.m. at what time will they next toll together




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Taking LCM of 16,45,60 and 75, we get, 3600
so after 3600 sec they will toll together
3600 sec=1 hour
so after 1 hour it will toll together
i.e. at 10 A.M.
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