Three bells ring at regular interval first bell rings after 10 minutes seconds after 15 minutes and third Bell after 20 minutes if there are together at 8 o'clock at what time will they ring again together?
Answers
Answered by
2
Answer:
9 o'clock
Step-by-step explanation:
Find the LCM of 10, 15 and 20.
It's LCM is 60.
This implies that the bell will ring after 60 minutes, i.e. 9 o'clock.
Or you could do the Logical way,
1st bell will ring at 8:10, 8:20, 8:30, 8:40, 8:50 & 9:00.
2nd one at 8:15, 8:30, 8:45, 9:00.
3rd at 8:20, 8:40, 9:00.
Above we notice that all of them ring at 9:00, therefore giving us the answer
Answered by
1
The LCM of 10,15 and 20 is 60 minutes.
We know,
1 hour=60 minutes.
So,the next time they will ring together is(8 o’clock +1 hour)
=9 o’clock (answer)
We know,
1 hour=60 minutes.
So,the next time they will ring together is(8 o’clock +1 hour)
=9 o’clock (answer)
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