Question

three bells toll at intervals of 9,12,and 15minutes respectively. if they start tolling together , after what time will they next toll together

Answer 1

Answer:

Step-by-step explanation:

the next common time of tolling is the LCM(9,12,15)

LCM(9,12,15)=180

therefore the next time they'll toll together is after 180 minutes/3 hours.

Answer 2

As they start together

they toll at intervals of 9,12,15

As they toll again after their multiples

So next they will toll is their lowest common multiple

LCM of 9,12,15 is 180

So after 180 minutes, they will next toll together