Answer:
5 : 00 PM
Step-by-step explanation:
Given,
Church ring bells every 15 minutes,
School rings its bells every 20 minutes,
And, day care center rings its bells every 25 minutes,
Thus, the number of minutes after which they will ring together = LCM (15, 20, 25)
∵ 15 = 3 × 5,
20 = 2 × 2 × 5,
25 = 5 × 5,
Thus, LCM (15, 20, 25) = 300
Now, 1 minute = 1/60 hours ⇒ 300 minutes = 5 hours,
Hence, after 5 hours they will ring together,
If they rang at 12:00 PM,
Then they will ring after 5 hours that is 5:00 PM.
