Question

4 bells toll together at 9am and they toll after every 7, 8, 11 ,12 second .how many times will they toll together again in next 3 hours.

Answer 1

First, find out the L.C.M of the 4 numbers since we need to know when the 4 bells will toll together at the same time in the next 3 hours. L.C.M of 7, 8, 11, 12 = 1848 seconds

3 hours = 3600 × 3 = 10800 seconds

Therefore, number of times the bell would toll ---> 10800/1848 = 5 times

Answer 2

Answer:here we have to find howdy many times they will tool together in next 3 hrs.

Given Bells toll together at 9.00 am. They

4 bells roll together

The bells toll after 7,11,8,12 secon respectively

7=1x7

11=1x11

8=2x2x2

12=2x2x3

Therefore,lcm(7,8,11,12)=7x2x2x2x11x3

=1848seconds

Therefore,they toll after each 1848 seconds

3hrs=3600x3 secs = 10800secs

Therefore,no:of times the bells would toll together=10800/1848

=5.84 times

That is 5 times in next 3hrs

Step-by-step explanation:

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