Jack and Jill ran a 400 meter race. Jill ran therace in 50 second and won by 5 meters; that is Jack had run only 295 meter when Jill crossed the finish line. They decide to race again,but this time Jill starts 5 meters behind the starting line. Assuming the both runner run at the same pace as before. who will win the seccond race and by how many second.Round the answer to neartest thousand of a second.

Answer 1

I think maybe Jack had run 395 meters, not 295 and will proceed on that basis.
Now Jill runs 400 meters in 50 seconds, or 8 meters/second
But Jack runs 395 meters in 50 seconds or 7.9 meters/second

so how long will it take Jill to run 405 meters?
405 meters / (8 meters/s) = 50.625 seconds
and how long will it take Jack to run 400 meters?
400/7.9 = 50.633 seconds
That should do it