Question

three bells chime at intervals of 30, 45 and 60 minutes respectively. If they being ringing together, after how long wil they chime together again?​

Answer 1

Answer:

After 890 minutes All three bells chime together again.

Step-by-step explanation:

Given:

Three bells chime at intervals of 30 , 45 and 60 minutes.

To find: time when they chime together again if they being to ring together.

We find LCM of 30 , 45 , 90 as required answer is this LCM.

By prime factorization method,

30 = 2 × 3 × 5

45 = 3 × 3 × 5

90 = 2 × 3 × 3 × 5

LCM = 3 × 5 × 2 × 3 = 90

Therefore, After 890 minutes All three bells chime together again.

Answer 2

Answer:

180 min

Step-by-step explanation:

Given:

Three bells chime at intervals of 30, 45, and 60 minutes.

To find a time when they chime together again if they are to ring together.

We find LCM of 30, 45, and 90 as the required answer is this LCM.

LCM of 30,45 and 90 is 180