Question 65
Three bells ring at intervals of 15, 30 and 45 minutes respectively. At what time will they ring together again, if they rang simultaneously at 8.00 AM ?
Solution
Given that three bells rang at intervals of 15, 30 and 45 minutes respectively.
They will together ring again in 90 minutes (LCM of 15, 30, 45).
90 minutes = 01 : 30 hours
Then, After 8 : 00 AM, they will again ring together in 08 : 00 + 01 : 30 = 09 : 30 AM
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