An air craft flying at an altitude of 18,000m fires a missile with a horizontal speed of 800m/s. How long will it take for the missile to hit the target? 

Question was not very clear if there are specific answer choices tell me and i'll try to you more. hope this though2 laps is 1 min. we know that for each min she does two times the amount of laps. for 12 laps we can do 12/2 which does give us 12 laps in 6 mins not 16 mins.