science
posted by 8. .
a train stooping at two stations 4km apart takes 4 min on the journey from one of the station to the other.assuming that it first accelerates with a uniform acceleration x and then that of uniform retardation Y,prove that 1/X+1/Y=2

Your umpteen posts have been removed.
Once you write up YOUR THOUGHTS about each question, please repost, and someone here will be happy to comment.