Three bells ring at the interval of 10, 15 and 20 minutes respectively – McqOptions

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1.	Three bells ring at the interval of 10, 15 and 20 minutes respectively. The three bells ring together at 12 : 45 PM at what time will they ring together next?
A.	1:45PM
B.	2:00PM
C.	2:45PM
D.	3:15PM
E.	None of these
Answer» B. 2:00PM

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