A bomb, originally sitting at rest, explodes and during the explosion breaks into four pieces of exactly 0.25 kg each.
piece flies due south at 10 m/s while another piece flies due
north at 10 m/s. What is the speed of each of the other two
pieces?

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.