question_answer

Direction: Choose the most appropriate option.

The traffic lights at three different signal points change after every 45 seconds, 75 seconds and 90 seconds respectively. If all change simultaneously at 7 : 20 : 15 hours, then they will change again simultaneously at

A) 7 : 27 : 30 hours   

B) 7 : 28 : 00 hours

C) 7 : 27 : 50 hours   

D) 7 : 27 : 45 hours