Answers

2015-10-13T10:15:49+05:30
lcm of 48,72,108 is 432
432 divide by 60 
you will get 7 minutes 12 seconds 
they change at 7:00 + 7.12
at 7:07 minutes 12 seconds they change

HOPE IT HELPS.....
0
2015-10-13T11:10:07+05:30
lcm of 48,72,108 is 432
432 divide by 60 
you will get 7 minutes 12 seconds 
they change at 7:00 + 7.12
at 7:07 minutes 12 seconds they change

HOPE IT HELPS....

0