Question

Three bells ring at intervals of 20minutes,30 minutes and 40 minutes if they start ring together at 7:00am. i) after how long will they all ring together again
ii) At what time will this be?

Answer 1

Answer:

Step-by-step explanation:

LCM of 20, 30 and 40

= 120

Therefore, the Bells would ring together in 120 Minutes or 2 hours

7:00 AM + 120 Minutes

7:00 AM + 2 Hours

9:00 AM

Therefore, the bells would ring together at 9:00 AM

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