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CAT 1995 Question-2

Q.)Three bells chime at an interval of 18 min, 24 min and 32 min. At a certain time they begin to chime together. What length of time will elapse before they chime together again?
A)2 hr and 24 min
B)4 hr and 48 min
C)1 hr and 36 min
D)5 hr

Solution :

The interval at which three bells will chime again = LCM OF 18 min, 24 min and 32 min
= 288 min = 4 hr 48 min

Hence , OPTION(B)


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