Three bells ring at intervals of 10, 15 and 20 minutes. If they all ring at 9.
a.m. together at what time will they ring again together!
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Answer:
Step-by-step explanation:
1st bell (10 minute) 2nd bell (15 minute) 3rd bell ( 20 minute)
9.00 9.00 9.00
9.10 9.15 9.20
9.20 9.30 9.40
9.30 9.45 10.00
9.40 10.00
9.50
10.00
10.00 am is common in all the three. So all the three will ring together at 10.00 am
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