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CBSE Class 10 Answered

4 bells toll together at 9:00 am. they toll after 7,8,11 and 12 seconds respectively. How many times will they toll together again in next 3 hours.
Asked by mridulla dharshini | 14 May, 2012, 05:55: PM
answered-by-expert Expert Answer
Taking lcm (7,8,11,12) = 1848

After every 1848 secs they will toll together.
 
In 3 hours there are 10800 secs ..
 
so they will toll together 5 times in the next 3 hours.
Answered by | 15 May, 2012, 09:58: AM

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