Question

three bell rings 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:

Given =>

Three bells ring on time interval of:

25 minutes. , 40 minutes. , 60 minutes.

Ones these three bells rung together, After time interval of X they again ring together.

So, X = ?

The LCM of these given numbers will be value of X.

By prime factorisation method

Prime factors of given numbers:

25 = 5×5.

40= 2×2×2×5

60=2×2×3×5.

So , LCM=>

2×2×2×3×5×5= 600 minutes.

600 minutes = 10 hrs.

So , after 10 hrs all bells ring together.

Answer 2

they will ring after 10 hours