1. Three bells ring simultaneously at 11 a.m. They ring at regular intervals of 20 minutes, 30 minutes, 40 minutes respectively. The time when all the three ring together next is
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By: anil on 05 May 2019 02.00 am
Bells are ringing at a regular interval of 20 min. , 30 min. , 40 min. respectively
hence time duration after which they will ring together will be least common multiple of 20, 30, 40
i.e. = 120
hence after 11:00 am , 120 min. later they will ring together i.e. 1:00 pm
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hence time duration after which they will ring together will be least common multiple of 20, 30, 40
i.e. = 120
hence after 11:00 am , 120 min. later they will ring together i.e. 1:00 pm