Three bells ring at intervals of 15, 20 and 30 minutes respectively, if they all rings at 11
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Answer:
Step-by-step explanation:
find the l.c.m of 15,20 and 30
which is 2^2×3×5=60
=60minutes
1 hour= 60minutes
? =60minutes
60÷60 = 1 hour
=1 hour
11:00 +1 hour
12:00 am/ pm
they will ring next at 12am /pm
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