In a fire range, four shooters are firing at their respective targets. The first, the second, the third and the fourth shooter hit the target once in every 5, 6, 7 and 8 seconds respectively. If all of them hit the target at 9:00 am, when will they hit their target together again.
They will hit the target together again after LCM of 5, 6, 7 and 8 seconds respectively.
LCM (5,6,7,8) = 5×6×7×8 seconds = 840 seconds = 840 / 60 minutes = 14 minutes
So, they hit the target together at 9:14 am.
The correct option is D.