In school duration of all period is junior section is 40 min and in senior section is 1 hour if the 1st bell for each section ring at the 9 am when will the two bells rings together again ?
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at 11 a.m
as,40 ×3 =120
60×2=120
so they both ring at 11 a.m
as,40 ×3 =120
60×2=120
so they both ring at 11 a.m
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