Three bells toll at intervals of 9, 12, 15 minutes respectively. If they start tolling together, after what time will they next toll together
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Given that three bells toll at intervals of 9,12,15 minutes.
Prime factorization of 9 = 3 * 3
Prime factorization of 12 = 2 * 2 * 3
Prime factorization of 15 = 3 * 5
LCM(9,12,15) = 3 * 3 * 2 * 2 * 5
= 180.
Therefore the bells will ring together after 180 minutes (or) 3 hours.
Hope this helps!
Prime factorization of 9 = 3 * 3
Prime factorization of 12 = 2 * 2 * 3
Prime factorization of 15 = 3 * 5
LCM(9,12,15) = 3 * 3 * 2 * 2 * 5
= 180.
Therefore the bells will ring together after 180 minutes (or) 3 hours.
Hope this helps!
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i think its wrong if you are a class 10 student then please check exercise 1.2 no 7 there is a similar question for you
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