The first bell rings every 6 minutes, the second bell rings every 7 minutes. The third bell rings every hour. If all the bells ring together at noon, at what time will they next ring altogether?
Answers
Answered by
9
1 hour is 60 mins so 3rd bell rings every 60 min
2nd bell rings every 7 mins and 1st bell rings every 6 mins
Let they ring at same time after every X mins
Now this X is there LCM actually(it is given by observation) thus lcm is 420mins that is 7 hours
so if it has rang at same time at 12 noon it will ring at 7 p.m. next.
thank you
2nd bell rings every 7 mins and 1st bell rings every 6 mins
Let they ring at same time after every X mins
Now this X is there LCM actually(it is given by observation) thus lcm is 420mins that is 7 hours
so if it has rang at same time at 12 noon it will ring at 7 p.m. next.
thank you
Similar questions