Two bells ring at intervals of 30 and 40 minutes respectively. Find the least time
interval after which they ring at a time. If they ring at 9:00 a.m. at once, at what
time will they ring together again?
Answers
Answer:
12 min
Step-by-step explanation:
Two bells are ringing together. If the bells ring at every 3 minutes and 4 minutes respectively, at what interval of time will they ring together again?
Just to amplify Mr Ayyappa’s correct answer (Quora doesn’t like short answers, I find).
The bells are irrelevant, the same maths would work with any periodic function - a metronome beat, drum beat, electronic pulse.
You have one frequency going at 1/3 per minute and another at 1/4 per minute. The beat frequency will be 1/3 - 1/4 = 1/12 per minute i.e. they will coincide once every 12 minutes.
hope it helps
Answer:
11.AM
Step-by-step explanation:
We have to find the LCM and for this it is 120. Now we convert it into Minutes which is 120 mins and then we have to convert it into hrs which is 2 hrs so after 2 hrs, which is 11pm, thwy will ring together again