at three different signals,light change after 48 sec,72 sec,108 sec respectively.if at morning 8:20:00 change together,then at what time again they will change together?	Choose the correct option:
A) 8:27:12  B) 8:27:24  C) 8:27:36  D) 8:27:48  E) 8:27:56
l.c.m of 48,72,108=7min.12sec   again they will change at=8:27:12   answer 8:27:12
<result>A</result>
at three different signals,light change after 48 sec,72 sec,108 sec respectively.if at morning 8:20:00 change together,then at what time again they will change together?