4 Bells toll together at 9 am. They toll after 7,8,11 and 12 seconds respectively. How many times will they toll together again in the next 3 Hours ?
Class 10 - Board Question
Answers
Answered by
1
Answer:
5 times
Step-by-step explanation:
From given, we have,
9:00 AM + LCM ( 7, 8, 11 & 12 )
⇒ 9:00 AM + 1848/60 Min
= 9:00 AM + 30.80 min
In 3 hours there are = 3600 × 3 = 10800 secs.
Number of times the bell would toll = 10800 secs/1848
Number of times the bell would toll = 5 times
After every 1848 secs, they will toll together.
So, The sequence will be 9:00 AM , 9:31 AM , 10 : 02 AM , 10:33 AM, 11:04 AM , 11: 35 AM…
Thus, in the 3 hours, the bells will toll together 5 times.
Please mark as the brainliest answer.
Similar questions