Question

three bells ring at a time interval of 25, 40 and 60 minutes respectively. If they have rung together now, after how long will they next ring together?​

Answer 1

Answer:

10 hours

Step-by-step explanation:

To find the minimum time,we have to find the LCM of 25,40,60

⇒ 25=5^2

⇒ 40= 2^3 *5

⇒ 60 = 2^2 *3*5

Therefore,

LCM = 2^3 *3*5^2 = 8*3*25 = 600

SO, they meet after 600 minutes

That is 10 hours. (1 hr. - 60 min)